diff --git a/src/main/java/mvp/deplog/domain/member/domain/repository/MemberRepository.java b/src/main/java/mvp/deplog/domain/member/domain/repository/MemberRepository.java
index 963dff3..d21d501 100644
--- a/src/main/java/mvp/deplog/domain/member/domain/repository/MemberRepository.java
+++ b/src/main/java/mvp/deplog/domain/member/domain/repository/MemberRepository.java
@@ -10,4 +10,6 @@ public interface MemberRepository extends JpaRepository<Member, Long> {
     Optional<Member> findByEmail(String email);
 
     boolean existsByEmail(String email);
+
+    Optional<Member> findById(Long id);
 }
diff --git a/src/main/java/mvp/deplog/domain/post/application/PostService.java b/src/main/java/mvp/deplog/domain/post/application/PostService.java
index ef293d2..e18ab56 100644
--- a/src/main/java/mvp/deplog/domain/post/application/PostService.java
+++ b/src/main/java/mvp/deplog/domain/post/application/PostService.java
@@ -354,4 +354,71 @@ public SuccessResponse<List<TempListRes>> getAllTempPosts(Long memberId) {
 
         return SuccessResponse.of(TempListRes);
     }
+
+    @Transactional
+    public SuccessResponse<CreatePostRes> modifyPost(Long memberId, Long postId, CreatePostReq createPostReq) {
+        validateTagName(createPostReq.getTagNameList());
+
+        Post post = postRepository.findById(postId)
+                .orElseThrow(() -> new ResourceNotFoundException("해당 id의 게시글을 찾을 수 없습니다: " + postId));
+        Member member = memberRepository.findById(memberId)
+                .orElseThrow(() -> new IllegalArgumentException("해당 id의 멤버를 찾을 수 없습니다: " + memberId));
+
+        if (!post.getMember().equals(member)) {
+            throw new UnauthorizedException("본인이 작성한 게시글이 아니므로 수정할 수 없습니다.");
+        }
+
+        String title = post.getTitle();
+        String content = post.getContent();
+        String previewContent = post.getPreviewContent();
+        String previewImage = post.getPreviewImage();
+
+        // 수정 전 게시글 내 이미지 url 추출
+        List<String> oldImageUrls = MarkdownUtil.extractImageLinks(content);
+
+        if(createPostReq.getTitle() != null) {
+            title = createPostReq.getTitle();
+        }
+        if(createPostReq.getContent() != null) {
+            content = createPostReq.getContent();
+            previewContent = MarkdownUtil.extractPreviewContent(content);
+            previewImage = MarkdownUtil.extractPreviewImage(content);
+        }
+
+        post.updatePost(title, content, previewContent, previewImage, post.getStage());
+
+        // 수정 후 게시글 내 이미지 url 추출
+        List<String> newImageUrls = MarkdownUtil.extractImageLinks(post.getContent());
+
+        // 기존 이미지 url이 수정된 게시글에 있는지 확인
+        for(String oldImageUrl : oldImageUrls) {
+            if(!newImageUrls.contains(oldImageUrl)) {
+                fileService.deleteFile(oldImageUrl, DIRNAME);
+            }
+        }
+
+        if(createPostReq.getTagNameList() != null && !createPostReq.getTagNameList().isEmpty()) {
+            taggingRepository.deleteByPost(post);
+
+            for (String tagName : createPostReq.getTagNameList()) {
+                if(tagName != null) {
+                    Tag tag = tagRepository.findByName(tagName)
+                            .orElseGet(() -> tagRepository.save(Tag.builder().name(tagName).build()));
+
+                    Tagging tagging = Tagging.builder()
+                            .post(post)
+                            .tag(tag)
+                            .build();
+
+                    taggingRepository.save(tagging);
+                }
+            }
+        }
+
+        CreatePostRes createPostRes = CreatePostRes.builder()
+                .postId(postId)
+                .build();
+
+        return SuccessResponse.of(createPostRes);
+    }
 }
diff --git a/src/main/java/mvp/deplog/domain/post/domain/repository/PostRepository.java b/src/main/java/mvp/deplog/domain/post/domain/repository/PostRepository.java
index 624d38d..6923cf2 100644
--- a/src/main/java/mvp/deplog/domain/post/domain/repository/PostRepository.java
+++ b/src/main/java/mvp/deplog/domain/post/domain/repository/PostRepository.java
@@ -11,9 +11,12 @@
 import org.springframework.data.repository.query.Param;
 
 import java.util.List;
+import java.util.Optional;
 
 public interface PostRepository extends JpaRepository<Post, Long> {
 
+    Optional<Post> findById(Long id);
+
     @Query("SELECT p FROM Post p WHERE p.member.part IN :parts")
     Page<Post> findByMemberPart(@Param("parts") List<Part> partGroup, Pageable pageable);
 
diff --git a/src/main/java/mvp/deplog/domain/post/presentation/PostApi.java b/src/main/java/mvp/deplog/domain/post/presentation/PostApi.java
index 34075fb..9c53f06 100644
--- a/src/main/java/mvp/deplog/domain/post/presentation/PostApi.java
+++ b/src/main/java/mvp/deplog/domain/post/presentation/PostApi.java
@@ -217,10 +217,10 @@ ResponseEntity<SuccessResponse<CreatePostRes>> createTempPost(
                     content = {@Content(mediaType = "application/json", schema = @Schema(implementation = ErrorResponse.class))}
             )
     })
-    @PutMapping("/publishing")
+    @PutMapping("/publishing/{postId}")
     ResponseEntity<SuccessResponse<CreatePostRes>> publishTempPost(
             @Parameter(description = "Access Token을 입력하세요.", required = true) @AuthenticationPrincipal UserDetailsImpl userDetails,
-            @Parameter(description = "발행할 임시 저장 게시글의 아이디를 입력하세요.", required = true) @RequestParam(value = "postId") Long postId,
+            @Parameter(description = "발행할 임시 저장 게시글의 아이디를 입력하세요.", required = true) @PathVariable(value = "postId") Long postId,
             @Parameter(description = "Schemas의 CreatePostReq를 참고해주세요.", required = true) @RequestBody CreatePostReq createPostReq
     );
 
@@ -228,7 +228,7 @@ ResponseEntity<SuccessResponse<CreatePostRes>> publishTempPost(
     @ApiResponses(value = {
             @ApiResponse(
                     responseCode = "200", description = "임시 저장 게시글 목록 조회 성공",
-                    content = {@Content(mediaType = "application/json", array = @ArraySchema(schema = @Schema(implementation = TempListRes.class)))}
+                    content = {@Content(mediaType = "application/json",array = @ArraySchema(schema = @Schema(implementation = TempListRes.class)))}
             ),
             @ApiResponse(
                     responseCode = "400", description = "임시 저장 게시글 목록 조회 실패",
@@ -239,4 +239,22 @@ ResponseEntity<SuccessResponse<CreatePostRes>> publishTempPost(
     ResponseEntity<SuccessResponse<List<TempListRes>>> getAllTempPosts(
             @Parameter(description = "Access Token을 입력하세요.", required = true) @AuthenticationPrincipal UserDetailsImpl userDetails
     );
+
+    @Operation(summary = "게시글 수정 API", description = "해당 아이디의 게시글을 수정합니다.")
+    @ApiResponses(value = {
+            @ApiResponse(
+                    responseCode = "200", description = "게시글 수정 성공",
+                    content = {@Content(mediaType = "application/json", schema = @Schema(implementation = CreatePostRes.class))}
+            ),
+            @ApiResponse(
+                    responseCode = "400", description = "게시글 수정 실패",
+                    content = {@Content(mediaType = "application/json", schema = @Schema(implementation = ErrorResponse.class))}
+            )
+    })
+    @PutMapping("/edits/{postId}")
+    ResponseEntity<SuccessResponse<CreatePostRes>> modifyPosts(
+            @Parameter(description = "Access Token을 입력하세요.", required = true) @AuthenticationPrincipal UserDetailsImpl userDetails,
+            @Parameter(description = "수정할 게시글의 아이디를 입력하세요.", required = true) @PathVariable(value = "postId") Long postId,
+            @Parameter(description = "Schemas의 CreatePostReq를 참고해주세요.", required = true) @RequestBody CreatePostReq createPostReq
+    );
 }
\ No newline at end of file
diff --git a/src/main/java/mvp/deplog/domain/post/presentation/PostController.java b/src/main/java/mvp/deplog/domain/post/presentation/PostController.java
index 8485f6f..52dbc95 100644
--- a/src/main/java/mvp/deplog/domain/post/presentation/PostController.java
+++ b/src/main/java/mvp/deplog/domain/post/presentation/PostController.java
@@ -99,9 +99,9 @@ public ResponseEntity<SuccessResponse<CreatePostRes>> createTempPost(@Authentica
     }
 
     @Override
-    @PutMapping("/publishing")
+    @PutMapping("/publishing/{postId}")
     public ResponseEntity<SuccessResponse<CreatePostRes>> publishTempPost(@AuthenticationPrincipal UserDetailsImpl userDetails,
-                                                                           @RequestParam(value = "postId") Long postId,
+                                                                           @PathVariable(value = "postId") Long postId,
                                                                            @RequestBody CreatePostReq createPostReq) {
         return ResponseEntity.ok(postService.publishTempPost(userDetails.getMember().getId(), postId, createPostReq));
     }
@@ -111,4 +111,12 @@ public ResponseEntity<SuccessResponse<CreatePostRes>> publishTempPost(@Authentic
     public ResponseEntity<SuccessResponse<List<TempListRes>>> getAllTempPosts(@AuthenticationPrincipal UserDetailsImpl userDetails){
         return ResponseEntity.ok(postService.getAllTempPosts(userDetails.getMember().getId()));
     }
+
+    @Override
+    @PutMapping("/edits/{postId}")
+    public ResponseEntity<SuccessResponse<CreatePostRes>> modifyPosts(@AuthenticationPrincipal UserDetailsImpl userDetails,
+                                                                      @PathVariable(value = "postId") Long postId,
+                                                                      @RequestBody CreatePostReq createPostReq) {
+        return ResponseEntity.ok(postService.modifyPost(userDetails.getMember().getId(), postId, createPostReq));
+    }
 }