diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..02565e7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,38 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+/src/main/resources/application.yml
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..0e2ec78
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,44 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.2.5'
+	id 'io.spring.dependency-management' version '1.1.4'
+}
+
+group = 'Journey'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	sourceCompatibility = '17'
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'mysql:mysql-connector-java:8.0.32'
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	implementation 'org.springframework.boot:spring-boot-starter-actuator'
+	runtimeOnly 'com.mysql:mysql-connector-j'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+
+	// S3 AWS
+	implementation("software.amazon.awssdk:bom:2.21.0")
+	implementation("software.amazon.awssdk:s3:2.21.0")
+	implementation 'org.apache.httpcomponents:httpclient:4.5.13'
+
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e644113
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..b82aa23
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..1aa94a4
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..25da30d
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..2c56130
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'Together'
diff --git a/src/main/java/Journey/Together/ServerApplication.java b/src/main/java/Journey/Together/ServerApplication.java
new file mode 100644
index 0000000..4de1c8a
--- /dev/null
+++ b/src/main/java/Journey/Together/ServerApplication.java
@@ -0,0 +1,13 @@
+package Journey.Together;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ServerApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ServerApplication.class, args);
+	}
+
+}
diff --git a/src/main/java/Journey/Together/common/dto/ApiResponse.java b/src/main/java/Journey/Together/common/dto/ApiResponse.java
new file mode 100644
index 0000000..25edee1
--- /dev/null
+++ b/src/main/java/Journey/Together/common/dto/ApiResponse.java
@@ -0,0 +1,36 @@
+package Journey.Together.common.dto;
+
+import Journey.Together.exception.Error;
+import Journey.Together.exception.Success;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor(access = AccessLevel.PRIVATE)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class ApiResponse<T> {
+
+	private final int code;
+	private final String message;
+	private T data;
+
+
+	public static ApiResponse success(Success success){
+		return new ApiResponse<>(success.getHttpStatusCode(), success.getMessage());
+	}
+
+	public static <T> ApiResponse<T> success(Success success, T data){
+		return new ApiResponse<T>(success.getHttpStatusCode(), success.getMessage(), data);
+	}
+
+	public static ApiResponse error(Error error){
+		return new ApiResponse<>(error.getErrorCode(), error.getMessage());
+	}
+
+	public static ApiResponse error(Error error, String message){
+		return new ApiResponse<>(error.getErrorCode(), message);
+	}
+}
diff --git a/src/main/java/Journey/Together/domain/BaseTimeEntity.java b/src/main/java/Journey/Together/domain/BaseTimeEntity.java
new file mode 100644
index 0000000..3cb424a
--- /dev/null
+++ b/src/main/java/Journey/Together/domain/BaseTimeEntity.java
@@ -0,0 +1,25 @@
+package Journey.Together.domain;
+
+
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.MappedSuperclass;
+import lombok.Getter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.time.LocalDateTime;
+
+@MappedSuperclass
+@Getter
+@EntityListeners(AuditingEntityListener.class)
+public abstract class BaseTimeEntity {
+
+    @CreatedDate  // 현재시각으로 초기화해줌
+    private LocalDateTime createdAt;
+
+    @LastModifiedDate
+    private LocalDateTime updateAt;
+
+
+}
diff --git a/src/main/java/Journey/Together/exception/Error.java b/src/main/java/Journey/Together/exception/Error.java
new file mode 100644
index 0000000..7994c59
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/Error.java
@@ -0,0 +1,53 @@
+package Journey.Together.exception;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public enum Error {
+
+	/**
+	 * 404 NOT FOUND
+	 */
+	NOT_FOUND(HttpStatus.NOT_FOUND, "찾을 수 없습니다."),
+
+	/**
+	 * 400 BAD REQUEST EXCEPTION
+	 */
+	BAD_REQUEST_VALIDATION(HttpStatus.BAD_REQUEST, "유효한 값으로 요청을 다시 보내주세요."),
+
+
+	/**
+	 * 401 UNAUTHORIZED EXCEPTION
+	 */
+	TOKEN_TIME_EXPIRED_EXCEPTION(HttpStatus.UNAUTHORIZED, "만료된 토큰입니다."),
+	EXPIRED_APPLE_IDENTITY_TOKEN(HttpStatus.UNAUTHORIZED, "만료된 아이덴티티 토큰입니다."),
+
+	/**
+	 * 403 FORBIDDEN EXCEPTION
+	 */
+	UNAUTHORIZED_ACCESS(HttpStatus.FORBIDDEN, "리소스에 대한 권한이 없습니다."),
+	INVALID_USER_ACCESS(HttpStatus.FORBIDDEN, "접근 권한이 없는 유저입니다."),
+
+	/**
+	 * 422 UNPROCESSABLE_ENTITY
+	 */
+	UNPROCESSABLE_ENTITY_DELETE_EXCEPTION(HttpStatus.UNPROCESSABLE_ENTITY, "서버에서 요청을 이해해 삭제하려는 도중 문제가 생겼습니다."),
+
+
+	/**
+	 * 500 INTERNAL_SERVER_ERROR
+	 */
+	INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "알 수 없는 서버 에러가 발생했습니다"),
+	;
+
+	private final HttpStatus httpStatus;
+	private final String message;
+
+	public int getErrorCode() {
+		return httpStatus.value();
+	}
+}
diff --git a/src/main/java/Journey/Together/exception/Success.java b/src/main/java/Journey/Together/exception/Success.java
new file mode 100644
index 0000000..d0538b1
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/Success.java
@@ -0,0 +1,69 @@
+package Journey.Together.exception;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+
+@Getter
+@RequiredArgsConstructor
+public enum Success {
+
+	/**
+	 * 201 CREATED
+	 */
+	CREATE_TOAST_SUCCESS(HttpStatus.CREATED, "토스트 저장이 완료 되었습니다."),
+	CREATE_CATEGORY_SUCCESS(HttpStatus.CREATED, "새 카테고리 추가 성공"),
+	CREATE_TIMER_SUCCESS(HttpStatus.CREATED, "새 타이머 생성 성공"),
+
+	/**
+	 * 200 OK
+	 */
+	GET_USER_MAIN_SUCCESS(HttpStatus.OK, "메인 페이지 유저 정보 조회 성공"),
+	GET_MYPAGE_SUCCESS(HttpStatus.OK, "마이 페이지 조회 성공"),
+	GET_LINKS_SUCCESS(HttpStatus.OK, "이주의 링크 조회 성공"),
+	GET_SITES_SUCCESS(HttpStatus.OK, "추천 사이트 조회 성공"),
+	GET_SETTINGS_SUCCESS(HttpStatus.OK, "설정 페이지 조회 성공"),
+
+	GET_CATEORIES_SUCCESS(HttpStatus.OK, "전체 카테고리 조회 성공"),
+	GET_CATEORY_SUCCESS(HttpStatus.OK, "세부 카테고리 조회 성공"),
+	GET_TIMER_SUCCESS(HttpStatus.OK, "타이머 조회 성공"),
+	GET_TIMER_PAGE_SUCCESS(HttpStatus.OK, "타이머 페이지 조회 성공"),
+	GET_DUPLICATED_SUCCESS(HttpStatus.OK, "중복 여부 체크 성공"),
+
+  	LOGIN_SUCCESS(HttpStatus.OK, "로그인 성공"),
+	RE_ISSUE_TOKEN_SUCCESS(HttpStatus.OK, "토큰 재발급 성공"),
+	SIGNOUT_SUCCESS(HttpStatus.OK, "로그아웃 성공"),
+	DELETE_USER_SUCCESS(HttpStatus.OK, "회원 탈퇴가 정상적으로 이루어졌습니다."),
+	DELETE_TOAST_SUCCESS(HttpStatus.OK, "토스트 삭제 성공"),
+	DELETE_CATEGORY_SUCCESS(HttpStatus.OK, "카테고리 삭제 성공"),
+	DELETE_TIMER_SUCCESS(HttpStatus.OK, "타이머 삭제 성공"),
+	SEARCH_SUCCESS(HttpStatus.OK, "검색 성공"),
+	PARSING_OG_SUCCESS(HttpStatus.OK, "og 데이터 파싱 결과입니다. 크롤링을 막은 페이지는 기본이미지가 나옵니다."),
+	UPDATE_PUSH_ALLOWED_SUCCESS(HttpStatus.OK, "푸시알림 수정 성공"),
+	UPDATE_TOAST_TITLE_SUCCESS(HttpStatus.OK, "토스트 제목 수정 성공"),
+
+	UPDATE_ISREAD_SUCCESS(HttpStatus.OK, "열람여부 수정 완료"),
+	UPDATE_CATEGORY_TITLE_SUCCESS(HttpStatus.OK, "카테고리 수정 완료"),
+	UPDATE_TIMER_DATETIME_SUCCESS(HttpStatus.OK, "타이머 시간/날짜 수정 완료"),
+	UPDATE_TIMER_COMMENT_SUCCESS(HttpStatus.OK, "타이머 코멘트 수정 완료"),
+	CHANGE_TIMER_ALARM_SUCCESS(HttpStatus.OK, "타이머 알람여부 수정 완료"),
+	PUSH_ALARM_PERIODIC_SUCCESS(HttpStatus.OK, "푸시알림 활성에 성공했습니다."),
+	PUSH_ALARM_SUCCESS(HttpStatus.OK, "푸시알림 전송에 성공했습니다."),
+	CLEAR_SCHEDULED_TASKS_SUCCESS(HttpStatus.OK, "스케줄러에서 예약된 작업을 제거했습니다."),
+
+
+	/**
+	 * 204 NO_CONTENT
+	 */
+	SEARCH_SUCCESS_BUT_IS_EMPTY(HttpStatus.NO_CONTENT, "검색에 성공했지만 조회된 내용이 없습니다.")
+
+	;
+
+	private final HttpStatus httpStatus;
+	private final String message;
+
+	public int getHttpStatusCode(){
+		return httpStatus.value();
+	}
+
+}
diff --git a/src/main/java/Journey/Together/exception/model/BadRequestException.java b/src/main/java/Journey/Together/exception/model/BadRequestException.java
new file mode 100644
index 0000000..5cbfeac
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/BadRequestException.java
@@ -0,0 +1,9 @@
+package Journey.Together.exception.model;
+
+import Journey.Together.exception.Error;
+public class BadRequestException extends CustomException{
+	public BadRequestException(Error error, String message) {
+		super(error, message);
+	}
+
+}
diff --git a/src/main/java/Journey/Together/exception/model/CustomException.java b/src/main/java/Journey/Together/exception/model/CustomException.java
new file mode 100644
index 0000000..e475bab
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/CustomException.java
@@ -0,0 +1,18 @@
+package Journey.Together.exception.model;
+
+import lombok.Getter;
+import Journey.Together.exception.Error;
+
+@Getter
+public class CustomException extends RuntimeException{
+	private final Error error;
+
+	public CustomException(Error error, String message) {
+		super(message);
+		this.error = error;
+	}
+
+	public int getHttpStatus() {
+		return error.getErrorCode();
+	}
+}
diff --git a/src/main/java/Journey/Together/exception/model/ForbiddenException.java b/src/main/java/Journey/Together/exception/model/ForbiddenException.java
new file mode 100644
index 0000000..8fed0a5
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/ForbiddenException.java
@@ -0,0 +1,10 @@
+package Journey.Together.exception.model;
+
+import Journey.Together.exception.Error;
+
+public class ForbiddenException extends CustomException{
+	public ForbiddenException(Error error, String message) {
+		super(error, message);
+	}
+
+}
\ No newline at end of file
diff --git a/src/main/java/Journey/Together/exception/model/NotFoundException.java b/src/main/java/Journey/Together/exception/model/NotFoundException.java
new file mode 100644
index 0000000..b8386f0
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/NotFoundException.java
@@ -0,0 +1,8 @@
+package Journey.Together.exception.model;
+
+import Journey.Together.exception.Error;
+public class NotFoundException extends CustomException {
+	public NotFoundException(Error error, String message) {
+		super(error, message);
+	}
+}
diff --git a/src/main/java/Journey/Together/exception/model/UnauthorizedException.java b/src/main/java/Journey/Together/exception/model/UnauthorizedException.java
new file mode 100644
index 0000000..89724b6
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/UnauthorizedException.java
@@ -0,0 +1,9 @@
+package Journey.Together.exception.model;
+
+import Journey.Together.exception.Error;
+public class UnauthorizedException extends CustomException{
+	public UnauthorizedException(Error error, String message) {
+		super(error, message);
+	}
+
+}
diff --git a/src/main/java/Journey/Together/exception/model/UnprocessableEntityException.java b/src/main/java/Journey/Together/exception/model/UnprocessableEntityException.java
new file mode 100644
index 0000000..d7b4a17
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/UnprocessableEntityException.java
@@ -0,0 +1,9 @@
+package Journey.Together.exception.model;
+
+import Journey.Together.exception.Error;
+
+public class UnprocessableEntityException extends CustomException{
+	public UnprocessableEntityException(Error error, String message) {
+		super(error, message);
+	}
+}
diff --git a/src/main/java/Journey/Together/exception/model/net/CustomJavaNetException.java b/src/main/java/Journey/Together/exception/model/net/CustomJavaNetException.java
new file mode 100644
index 0000000..55310d2
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/net/CustomJavaNetException.java
@@ -0,0 +1,21 @@
+package Journey.Together.exception.model.net;
+
+import lombok.Getter;
+
+import java.io.IOException;
+import Journey.Together.exception.Error;
+
+@Getter
+public class CustomJavaNetException extends IOException {
+	private final Error error;
+
+	public CustomJavaNetException(Error error, String message) {
+		super(message);
+		this.error = error;
+	}
+
+	public int getHttpStatus() {
+		return error.getErrorCode();
+	}
+
+}
diff --git a/src/main/java/Journey/Together/exception/model/net/UnknownHostException.java b/src/main/java/Journey/Together/exception/model/net/UnknownHostException.java
new file mode 100644
index 0000000..7fb08af
--- /dev/null
+++ b/src/main/java/Journey/Together/exception/model/net/UnknownHostException.java
@@ -0,0 +1,8 @@
+package Journey.Together.exception.model.net;
+import Journey.Together.exception.Error;
+public class UnknownHostException extends CustomJavaNetException {
+	public UnknownHostException(Error error, String message) {
+		super(error, message);
+	}
+
+}
diff --git a/src/main/java/Journey/Together/external/aws/AWSConfig.java b/src/main/java/Journey/Together/external/aws/AWSConfig.java
new file mode 100644
index 0000000..3286735
--- /dev/null
+++ b/src/main/java/Journey/Together/external/aws/AWSConfig.java
@@ -0,0 +1,57 @@
+package Journey.Together.external.aws;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import software.amazon.awssdk.auth.credentials.SystemPropertyCredentialsProvider;
+import software.amazon.awssdk.regions.Region;
+import software.amazon.awssdk.services.s3.S3Client;
+import software.amazon.awssdk.services.s3.presigner.S3Presigner;
+
+@Configuration
+public class AWSConfig {
+
+	private static final String AWS_ACCESS_KEY_ID = "aws.accessKeyId";
+	private static final String AWS_SECRET_ACCESS_KEY = "aws.secretAccessKey";
+
+	private final String accessKey;
+	private final String secretKey;
+	private final String regionString;
+
+	public AWSConfig(@Value("${aws-property.access-key}") final String accessKey,
+		@Value("${aws-property.secret-key}") final String secretKey,
+		@Value("${aws-property.aws-region}") final String regionString) {
+		this.accessKey = accessKey;
+		this.secretKey = secretKey;
+		this.regionString = regionString;
+	}
+
+
+	@Bean
+	public SystemPropertyCredentialsProvider systemPropertyCredentialsProvider() {
+		System.setProperty(AWS_ACCESS_KEY_ID, accessKey);
+		System.setProperty(AWS_SECRET_ACCESS_KEY, secretKey);
+		return SystemPropertyCredentialsProvider.create();
+	}
+
+	@Bean
+	public Region getRegion() {
+		return Region.of(regionString);
+	}
+
+	@Bean
+	public S3Client getS3Client() {
+		return S3Client.builder()
+			.region(getRegion())
+			.credentialsProvider(systemPropertyCredentialsProvider())
+			.build();
+	}
+
+	@Bean
+	public S3Presigner getS3Presigner() {
+		return S3Presigner.builder()
+			.region(getRegion())
+			.credentialsProvider(systemPropertyCredentialsProvider())
+			.build();
+	}
+}
diff --git a/src/main/java/Journey/Together/external/aws/ImagePresignedUrlResponse.java b/src/main/java/Journey/Together/external/aws/ImagePresignedUrlResponse.java
new file mode 100644
index 0000000..1968400
--- /dev/null
+++ b/src/main/java/Journey/Together/external/aws/ImagePresignedUrlResponse.java
@@ -0,0 +1,7 @@
+package Journey.Together.external.aws;
+
+public record ImagePresignedUrlResponse(String fileName, String preSignedUrl) {
+	public static ImagePresignedUrlResponse of(String fileName, String url){
+		return new ImagePresignedUrlResponse(fileName, url);
+	}
+}
diff --git a/src/main/java/Journey/Together/external/aws/PresignedUrlVO.java b/src/main/java/Journey/Together/external/aws/PresignedUrlVO.java
new file mode 100644
index 0000000..2443532
--- /dev/null
+++ b/src/main/java/Journey/Together/external/aws/PresignedUrlVO.java
@@ -0,0 +1,7 @@
+package Journey.Together.external.aws;
+
+public record PresignedUrlVO(String fileName, String url) {
+	public static PresignedUrlVO of(String fileName, String url){
+		return new PresignedUrlVO(fileName, url);
+	}
+}
diff --git a/src/main/java/Journey/Together/external/aws/S3Service.java b/src/main/java/Journey/Together/external/aws/S3Service.java
new file mode 100644
index 0000000..5f85f65
--- /dev/null
+++ b/src/main/java/Journey/Together/external/aws/S3Service.java
@@ -0,0 +1,188 @@
+package Journey.Together.external.aws;
+
+import Journey.Together.exception.Error;
+import Journey.Together.exception.model.BadRequestException;
+import Journey.Together.exception.model.CustomException;
+import Journey.Together.exception.model.NotFoundException;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.multipart.MultipartFile;
+import software.amazon.awssdk.core.sync.RequestBody;
+import software.amazon.awssdk.services.s3.S3Client;
+import software.amazon.awssdk.services.s3.model.DeleteObjectRequest;
+import software.amazon.awssdk.services.s3.model.GetUrlRequest;
+import software.amazon.awssdk.services.s3.model.PutObjectRequest;
+import software.amazon.awssdk.services.s3.model.S3Exception;
+import software.amazon.awssdk.services.s3.presigner.S3Presigner;
+import software.amazon.awssdk.services.s3.presigner.model.PutObjectPresignRequest;
+
+import java.io.IOException;
+import java.net.URL;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+@Component
+@Slf4j
+public class S3Service {
+	private final String bucketName;
+	private final AWSConfig awsConfig;
+
+	private static final Long MAX_FILE_SIZE = 5 * 1024 * 1024L;
+	private static final Long PRE_SIGNED_URL_EXPIRE_MINUTE = 1L;
+
+
+
+	public S3Service(@Value("${aws-property.s3-bucket-name}") final String bucketName, AWSConfig awsConfig) {
+		this.bucketName = bucketName;
+		this.awsConfig = awsConfig;
+	}
+
+	public String uploadImage(MultipartFile multipartFile, String folder) {
+		final String key = folder + createFileName(multipartFile.getOriginalFilename());
+		final S3Client s3Client = awsConfig.getS3Client();
+
+		validateFileSize(multipartFile);
+
+		PutObjectRequest request = PutObjectRequest.builder()
+			.bucket(bucketName)
+			.key(key)
+			.contentType(multipartFile.getContentType())
+			.contentLength(multipartFile.getSize())
+			.contentDisposition("inline")
+			.build();
+
+		try {
+			RequestBody requestBody = RequestBody.fromBytes(multipartFile.getBytes());
+			s3Client.putObject(request, requestBody);
+			return key;
+		} catch(IOException e) {
+			throw new NotFoundException(Error.NOT_FOUND_IMAGE_EXCEPTION, Error.NOT_FOUND_IMAGE_EXCEPTION.getMessage());
+		}
+	}
+
+
+	public List<String> uploadImages(List<MultipartFile> multipartFileList, String folder) {
+		final S3Client s3Client = awsConfig.getS3Client();
+		List<String> list = new ArrayList<>();
+		for (int i = 0; i < multipartFileList.size(); i++) {
+			String key = folder + createFileName(multipartFileList.get(i).getOriginalFilename());
+			PutObjectRequest request = PutObjectRequest.builder()
+				.bucket(bucketName)
+				.key(key)
+				.contentType(multipartFileList.get(i).getContentType())
+				.contentLength(multipartFileList.get(i).getSize())
+				.contentDisposition("inline")
+				.build();
+
+			try {
+				RequestBody requestBody = RequestBody.fromBytes(multipartFileList.get(i).getBytes());
+				s3Client.putObject(request, requestBody);
+				list.add(key);
+			} catch(IOException e) {
+				throw new NotFoundException(Error.NOT_FOUND_IMAGE_EXCEPTION, Error.NOT_FOUND_IMAGE_EXCEPTION.getMessage());
+			}
+		}
+		return list;
+	}
+
+	// 파일명 (중복 방지)
+	private String createFileName(String fileName) {
+		return UUID.randomUUID().toString().concat(getFileExtension(fileName));
+	}
+
+	// 파일 유효성 검사
+	private String getFileExtension(String fileName) {
+		if (fileName.length() == 0) {
+			throw new NotFoundException(Error.NOT_FOUND_IMAGE_EXCEPTION, Error.NOT_FOUND_IMAGE_EXCEPTION.getMessage());
+		}
+		ArrayList<String> fileValidate = new ArrayList<>();
+		fileValidate.add(".jpg");
+		fileValidate.add(".jpeg");
+		fileValidate.add(".png");
+		fileValidate.add(".JPG");
+		fileValidate.add(".JPEG");
+		fileValidate.add(".PNG");
+		System.out.println("여기여기기");
+		String idxFileName = fileName.substring(fileName.lastIndexOf("."));
+		if (!fileValidate.contains(idxFileName)) {
+			throw new BadRequestException(Error.BAD_REQUEST_FILE_EXTENSION, Error.BAD_REQUEST_FILE_EXTENSION.getMessage());
+		}
+		System.out.println("여기기기기기ㅣ기");
+		return fileName.substring(fileName.lastIndexOf("."));
+	}
+
+	// 이미지 삭제
+	public void deleteImage(String key) throws IOException {
+		final S3Client s3Client = awsConfig.getS3Client();
+
+		s3Client.deleteObject((DeleteObjectRequest.Builder builder) ->
+			builder.bucket(bucketName)
+				.key(key)
+				.build()
+		);
+	}
+
+	public void deleteImages(List<String> keys) throws IOException{
+		final S3Client s3Client = awsConfig.getS3Client();
+		for (String key : keys) {
+			s3Client.deleteObject((DeleteObjectRequest.Builder builder) ->
+				builder.bucket(bucketName)
+					.key(key)
+					.build()
+			);
+		}
+	}
+
+	private void validateFileSize(MultipartFile image) {
+		if (image.getSize() > MAX_FILE_SIZE) {
+			throw new BadRequestException(Error.BAD_REQUEST_FILE_SIZE, Error.BAD_REQUEST_FILE_SIZE.getMessage());
+		}
+	}
+
+	// 만료시간 1분
+
+	public PresignedUrlVO getUploadPreSignedUrl(final String filename, final String folder) {
+		final String fileName = createFileName(filename);
+		final String key = folder + fileName;
+		System.out.println("하이");
+		log.info(fileName);
+		log.info(key);
+
+		S3Presigner preSigner = awsConfig.getS3Presigner();
+
+		PutObjectRequest putObjectRequest = PutObjectRequest.builder()
+			.bucket(bucketName)
+			.key(key)
+			.build();
+		log.info("-----");
+		PutObjectPresignRequest preSignedUrlRequest = PutObjectPresignRequest.builder()
+			.signatureDuration(Duration.ofMinutes(PRE_SIGNED_URL_EXPIRE_MINUTE))
+			.putObjectRequest(putObjectRequest)
+			.build();
+		log.info("-----");
+		String url = preSigner.presignPutObject(preSignedUrlRequest).url().toString();
+
+		return PresignedUrlVO.of(fileName, url);
+	}
+
+	public String getURL(String keyName) {
+		final S3Client s3Client = awsConfig.getS3Client();
+		try {
+			GetUrlRequest request = GetUrlRequest.builder()
+				.bucket(bucketName)
+				.key(keyName)
+				.build();
+
+			URL url = s3Client.utilities().getUrl(request);
+			System.out.println("The URL for  "+keyName +" is "+ url);
+			return "The URL for  "+keyName +" is "+ url;
+
+		} catch (S3Exception e) {
+			throw new CustomException(Error.UNPROCESSABLE_PRESIGNEDURL_EXCEPTION, Error.UNPROCESSABLE_PRESIGNEDURL_EXCEPTION.getMessage());
+			// Exception을 뿌려준다!! 사진 제대로 안 올라갔으니까 다시 올려라 ...
+		}
+	}
+}
diff --git a/src/test/java/Journey/Together/ServerApplicationTests.java b/src/test/java/Journey/Together/ServerApplicationTests.java
new file mode 100644
index 0000000..1be6924
--- /dev/null
+++ b/src/test/java/Journey/Together/ServerApplicationTests.java
@@ -0,0 +1,13 @@
+package Journey.Together;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class ServerApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}