diff --git a/src/main/java/balancetalk/global/config/SecurityConfig.java b/src/main/java/balancetalk/global/config/SecurityConfig.java
index e2588616a..38fde223e 100644
--- a/src/main/java/balancetalk/global/config/SecurityConfig.java
+++ b/src/main/java/balancetalk/global/config/SecurityConfig.java
@@ -39,7 +39,7 @@ public class SecurityConfig {
     private static final String[] PUBLIC_POST = {
             "/members/join", "/members/login",
             "/email/request", "/email/verify",
-            "/posts/{postId}/vote"
+            "/posts/{postId}/vote", "/files/image/upload"
     };
 
     private static final String[] PUBLIC_PUT = {
diff --git a/src/main/java/balancetalk/global/jwt/JwtTokenProvider.java b/src/main/java/balancetalk/global/jwt/JwtTokenProvider.java
index d752ed603..857c9caae 100644
--- a/src/main/java/balancetalk/global/jwt/JwtTokenProvider.java
+++ b/src/main/java/balancetalk/global/jwt/JwtTokenProvider.java
@@ -39,9 +39,11 @@ public class JwtTokenProvider {
     /**
      * Access 토큰 생성
      */
-    public String createAccessToken(Authentication authentication) {
+    public String createAccessToken(Authentication authentication, Long memberId) {
         validateAuthentication(authentication);
-        Claims claims = Jwts.claims().setSubject(authentication.getName());
+        Claims claims = Jwts.claims();
+        claims.put("memberId", memberId);
+        claims.setSubject(authentication.getName());
         Date now = new Date();
         Date expireDate = new Date(now.getTime() + accessExpirationTime);
 
@@ -56,9 +58,11 @@ public String createAccessToken(Authentication authentication) {
     /**
      * Refresh 토큰 생성
      */
-    public String createRefreshToken(Authentication authentication) {
+    public String createRefreshToken(Authentication authentication, Long memberId) {
         validateAuthentication(authentication);
-        Claims claims = Jwts.claims().setSubject(authentication.getName());
+        Claims claims = Jwts.claims();
+        claims.put("memberId", memberId);
+        claims.setSubject(authentication.getName());
         Date now = new Date();
         Date expireDate = new Date(now.getTime() + refreshExpirationTime);
 
@@ -94,6 +98,12 @@ public String getPayload(String token) {
         return Jwts.parserBuilder().setSigningKey(secretKey).build().parseClaimsJws(token).getBody().getSubject();
     }
 
+    public Long getMemberId(String token) {
+        validateToken(token);
+        Claims claims = Jwts.parserBuilder().setSigningKey(secretKey).build().parseClaimsJws(token).getBody();
+        return claims.get("memberId", Long.class);
+    }
+
     public boolean validateToken(String token) {
         try {
             Jws<Claims> claims = Jwts.parserBuilder().setSigningKey(secretKey).build().parseClaimsJws(token);
@@ -113,7 +123,7 @@ private void validateAuthentication(Authentication authentication) {
         }
     }
 
-    public TokenDto reissueToken(String refreshToken) {
+    public TokenDto reissueToken(String refreshToken, Long memberId) {
         validateToken(refreshToken);
         Authentication authentication = getAuthentication(refreshToken);
         // redis에 저장된 RefreshToken 값을 가져옴
@@ -122,8 +132,8 @@ public TokenDto reissueToken(String refreshToken) {
             throw new BalanceTalkException(ErrorCode.INVALID_REFRESH_TOKEN);
         }
         TokenDto tokenDto = new TokenDto(
-                createAccessToken(authentication),
-                createRefreshToken(authentication)
+                createAccessToken(authentication, memberId),
+                createRefreshToken(authentication, memberId)
         );
         return tokenDto;
     }
diff --git a/src/main/java/balancetalk/module/member/application/MemberService.java b/src/main/java/balancetalk/module/member/application/MemberService.java
index 359505377..3d1918d2f 100644
--- a/src/main/java/balancetalk/module/member/application/MemberService.java
+++ b/src/main/java/balancetalk/module/member/application/MemberService.java
@@ -9,6 +9,7 @@
 import balancetalk.module.member.domain.Member;
 import balancetalk.module.member.domain.MemberRepository;
 import balancetalk.module.member.dto.*;
+import io.jsonwebtoken.ExpiredJwtException;
 import jakarta.servlet.http.HttpServletRequest;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -24,7 +25,7 @@
 import java.util.List;
 import java.util.stream.Collectors;
 
-import static balancetalk.global.exception.ErrorCode.NOT_FOUND_FILE;
+import static balancetalk.global.exception.ErrorCode.*;
 
 @Slf4j
 @Service
@@ -40,6 +41,12 @@ public class MemberService {
 
     @Transactional
     public Long join(final JoinRequest joinRequest) {
+        if (memberRepository.existsByEmail(joinRequest.getEmail())) {
+            throw new BalanceTalkException(ALREADY_REGISTERED_EMAIL);
+        }
+        if (memberRepository.existsByNickname(joinRequest.getNickname())) {
+            throw new BalanceTalkException(ALREADY_REGISTERED_NICKNAME);
+        }
         joinRequest.setPassword(passwordEncoder.encode(joinRequest.getPassword()));
         File profilePhoto = null;
         if (joinRequest.getProfilePhoto() != null && !joinRequest.getProfilePhoto().isEmpty()) {
@@ -63,8 +70,8 @@ public TokenDto login(final LoginRequest loginRequest) {
         Authentication authentication = authenticationManager.authenticate(
                 new UsernamePasswordAuthenticationToken(loginRequest.getEmail(), loginRequest.getPassword())
         );
-        String refreshToken = jwtTokenProvider.createRefreshToken(authentication);
-        return jwtTokenProvider.reissueToken(refreshToken); // 만료되었다면, 재발급
+        String refreshToken = jwtTokenProvider.createRefreshToken(authentication, member.getId());
+        return jwtTokenProvider.reissueToken(refreshToken, member.getId()); // 만료되었다면, 재발급
     }
 
     @Transactional(readOnly = true)
diff --git a/src/main/java/balancetalk/module/member/domain/MemberRepository.java b/src/main/java/balancetalk/module/member/domain/MemberRepository.java
index 9e40086e7..1653f927e 100644
--- a/src/main/java/balancetalk/module/member/domain/MemberRepository.java
+++ b/src/main/java/balancetalk/module/member/domain/MemberRepository.java
@@ -9,6 +9,7 @@ public interface MemberRepository extends JpaRepository<Member, Long> {
     Optional<Member> findByEmail(String username);
     boolean existsByNickname(String nickname);
 
+    boolean existsByEmail(String email);
     void deleteByEmail(String email);
 
     @Query("select m.id from Member m JOIN m.votes v WHERE v.balanceOption.id = :balanceOptionId")
diff --git a/src/test/java/balancetalk/module/member/application/MemberServiceTest.java b/src/test/java/balancetalk/module/member/application/MemberServiceTest.java
index a8be6b232..10f0b9d5c 100644
--- a/src/test/java/balancetalk/module/member/application/MemberServiceTest.java
+++ b/src/test/java/balancetalk/module/member/application/MemberServiceTest.java
@@ -130,7 +130,7 @@ void LoginMember_Success() {
         // given
         when(memberRepository.findByEmail(loginRequest.getEmail())).thenReturn(Optional.ofNullable(member));
         when(passwordEncoder.matches(eq(loginRequest.getPassword()), eq(joinRequest.getPassword()))).thenReturn(true);
-        when(jwtTokenProvider.reissueToken(any())).thenReturn(new TokenDto(accessToken, refreshToken));
+        when(jwtTokenProvider.reissueToken(any() , anyLong())).thenReturn(new TokenDto(accessToken, refreshToken));
 
         // when
         TokenDto result = memberService.login(loginRequest);
diff --git a/src/test/java/balancetalk/module/notice/presentation/NoticeControllerTest.java b/src/test/java/balancetalk/module/notice/presentation/NoticeControllerTest.java
index 8d13d4005..3ad6681d3 100644
--- a/src/test/java/balancetalk/module/notice/presentation/NoticeControllerTest.java
+++ b/src/test/java/balancetalk/module/notice/presentation/NoticeControllerTest.java
@@ -20,6 +20,7 @@
 // import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 // import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
+
 @ExtendWith(SpringExtension.class)
 @SpringBootTest
 @AutoConfigureMockMvc