diff --git a/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java b/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java
index 474d8f8..749e6d5 100644
--- a/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java
+++ b/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java
@@ -5,6 +5,8 @@
 import com.hobak.happinessql.domain.activity.dto.*;
 import com.hobak.happinessql.domain.user.application.UserFindService;
 import com.hobak.happinessql.domain.user.domain.User;
+import com.hobak.happinessql.global.exception.GeneralException;
+import com.hobak.happinessql.global.response.Code;
 import com.hobak.happinessql.global.response.DataResponseDto;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -46,17 +48,30 @@ public DataResponseDto<ActivityResponseDto> createActivity(@RequestBody Activity
 
     @Operation(summary = "활동 삭제", description = "기타 카테고리에 있는 활동을 삭제합니다.")
     @DeleteMapping("/{activityId}")
-    public DataResponseDto<ActivityResponseDto> deleteActivity(@PathVariable Long activityId){
-        activityDeleteService.deleteActivity(activityId);
-        ActivityResponseDto responseDto = ActivityConverter.toActivityResponseDto(activityId);
-        return DataResponseDto.of(responseDto, "활동을 성공적으로 삭제했습니다.");
+    public DataResponseDto<ActivityResponseDto> deleteActivity(@PathVariable Long activityId, @AuthenticationPrincipal UserDetails userDetails){
+        User user = userFindService.findByUserDetails(userDetails);
+        Long deleteActivityId = activityDeleteService.deleteActivity(activityId, user);
+        if(deleteActivityId != null) {
+            ActivityResponseDto responseDto = ActivityConverter.toActivityResponseDto(deleteActivityId);
+            return DataResponseDto.of(responseDto, "활동을 성공적으로 삭제했습니다.");
+        }
+        else {
+            throw new GeneralException(Code.INTERNAL_ERROR,"본인이 추가하지 않은 활동은 삭제가 불가합니다.");
+        }
+
     }
 
     @Operation(summary = "활동 수정", description = "기타 카테고리에 있는 활동을 수정합니다.")
     @PutMapping("/{activityId}")
-    public DataResponseDto<ActivityUpdateResponseDto> updateActicity(@PathVariable Long activityId, @RequestBody ActivityUpdateRequestDto requestDto){
-        ActivityUpdateResponseDto responseDto = activityUpdateService.updateActivity(activityId,requestDto);
-        return DataResponseDto.of(responseDto,"활동을 성공적으로 수정했습니다.");
+    public DataResponseDto<ActivityUpdateResponseDto> updateActivity(@PathVariable Long activityId, @RequestBody ActivityUpdateRequestDto requestDto, @AuthenticationPrincipal UserDetails userDetails){
+        User user = userFindService.findByUserDetails(userDetails);
+        ActivityUpdateResponseDto responseDto = activityUpdateService.updateActivity(activityId,requestDto, user);
+        if(responseDto != null){
+            return DataResponseDto.of(responseDto,"활동을 성공적으로 수정했습니다.");
+        }
+        else {
+            throw new GeneralException(Code.INTERNAL_ERROR,"본인이 추가하지 않은 활동은 수정이 불가합니다.");
+        }
     }
 
     @Operation(summary = "활동 검색", description = "유저가 갖고 있는 활동을 검색합니다. (활동의 description에 있는 내용은 아직 검색되지 않습니다.)")
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityDeleteService.java b/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityDeleteService.java
index ab3d3d8..289c708 100644
--- a/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityDeleteService.java
+++ b/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityDeleteService.java
@@ -4,6 +4,7 @@
 import com.hobak.happinessql.domain.activity.domain.Activity;
 import com.hobak.happinessql.domain.activity.exception.ActivityNotFoundException;
 import com.hobak.happinessql.domain.activity.repository.ActivityRepository;
+import com.hobak.happinessql.domain.user.domain.User;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -13,9 +14,13 @@
 @RequiredArgsConstructor
 public class ActivityDeleteService {
     private final ActivityRepository activityRepository;
-    public void deleteActivity(Long activityId){
+    public Long deleteActivity(Long activityId, User user){
         Activity activity = activityRepository.findById(activityId)
                 .orElseThrow(()->new ActivityNotFoundException("Activity with id " + activityId));
-        activityRepository.delete(activity);
+        if(activity.getCategory().getUserId().equals(user.getUserId())) {
+            activityRepository.delete(activity);
+            return activity.getActivityId();
+        }
+        return null;
     }
 }
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java b/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java
index a7e2592..06102fc 100644
--- a/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java
+++ b/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java
@@ -6,6 +6,7 @@
 import com.hobak.happinessql.domain.activity.dto.ActivityUpdateResponseDto;
 import com.hobak.happinessql.domain.activity.exception.ActivityNotFoundException;
 import com.hobak.happinessql.domain.activity.repository.ActivityRepository;
+import com.hobak.happinessql.domain.user.domain.User;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -16,11 +17,14 @@
 public class ActivityUpdateService {
     private final ActivityRepository activityRepository;
 
-    public ActivityUpdateResponseDto updateActivity(Long activityId, ActivityUpdateRequestDto requestDto){
+    public ActivityUpdateResponseDto updateActivity(Long activityId, ActivityUpdateRequestDto requestDto, User user){
         Activity activity = activityRepository.findById(activityId)
                 .orElseThrow(()-> new ActivityNotFoundException("Activity with id " + activityId));
-        activity.updateName(requestDto.getName());
-        return ActivityConverter.toActivityUpdateResponseDto(activity);
+        if(activity.getCategory().getUserId().equals(user.getUserId())) {
+            activity.updateName(requestDto.getName());
+            return ActivityConverter.toActivityUpdateResponseDto(activity);
+        }
+        return null;
     }
 
 }