diff --git a/src/main/java/com/beotkkot/qtudy/dto/request/comments/CommentsRequestDto.java b/src/main/java/com/beotkkot/qtudy/dto/request/comments/CommentsRequestDto.java
new file mode 100644
index 0000000..2adfb7b
--- /dev/null
+++ b/src/main/java/com/beotkkot/qtudy/dto/request/comments/CommentsRequestDto.java
@@ -0,0 +1,30 @@
+package com.beotkkot.qtudy.dto.request.comments;
+
+import com.beotkkot.qtudy.domain.comments.Comments;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.text.SimpleDateFormat;
+import java.time.Instant;
+import java.util.Date;
+
+@NoArgsConstructor
+@Getter
+public class CommentsRequestDto {
+    private String content;
+    private Long userUid;
+
+    public Comments toEntity(Long postId) {
+        Date now = Date.from(Instant.now());
+        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        String writeDatetime = simpleDateFormat.format(now);
+
+        return Comments.builder()
+                .userUid(userUid)
+                .postId(postId)
+                .content(content)
+                .createdAt(writeDatetime)
+                .build();
+    }
+
+}
diff --git a/src/main/java/com/beotkkot/qtudy/dto/response/comments/CommentsResponseDto.java b/src/main/java/com/beotkkot/qtudy/dto/response/comments/CommentsResponseDto.java
new file mode 100644
index 0000000..0dce2c4
--- /dev/null
+++ b/src/main/java/com/beotkkot/qtudy/dto/response/comments/CommentsResponseDto.java
@@ -0,0 +1,35 @@
+package com.beotkkot.qtudy.dto.response.comments;
+
+import com.beotkkot.qtudy.common.ResponseCode;
+import com.beotkkot.qtudy.common.ResponseMessage;
+import com.beotkkot.qtudy.dto.response.ResponseDto;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+@Getter
+public class CommentsResponseDto extends ResponseDto{
+    public CommentsResponseDto() {
+        super(ResponseCode.SUCCESS, ResponseMessage.SUCCESS);
+    }
+
+    public static ResponseEntity<CommentsResponseDto> success() {
+        CommentsResponseDto result = new CommentsResponseDto();
+        return ResponseEntity.status(HttpStatus.OK).body(result);
+    }
+
+    public static ResponseEntity<ResponseDto> notExistedPost(){
+        ResponseDto result = new ResponseDto(ResponseCode.NOT_EXISTED_POST, ResponseMessage.NOT_EXISTED_POST);
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(result);
+    }
+
+    public static ResponseEntity<ResponseDto> notExistedUser() {
+        ResponseDto result = new ResponseDto(ResponseCode.NOT_EXISTED_USER, ResponseMessage.NOT_EXISTED_USER);
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(result);
+    }
+
+    public static ResponseEntity<? super CommentsResponseDto> notExistedComment() {
+        ResponseDto result = new ResponseDto(ResponseCode.NOT_EXISTED_COMMENT, ResponseMessage.NOT_EXISTED_COMMENT);
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(result);
+    }
+}
diff --git a/src/main/java/com/beotkkot/qtudy/dto/response/comments/GetCommentsAllResponseDto.java b/src/main/java/com/beotkkot/qtudy/dto/response/comments/GetCommentsAllResponseDto.java
new file mode 100644
index 0000000..3ba9845
--- /dev/null
+++ b/src/main/java/com/beotkkot/qtudy/dto/response/comments/GetCommentsAllResponseDto.java
@@ -0,0 +1,37 @@
+package com.beotkkot.qtudy.dto.response.comments;
+
+import com.beotkkot.qtudy.common.ResponseCode;
+import com.beotkkot.qtudy.common.ResponseMessage;
+import com.beotkkot.qtudy.dto.object.CommentListItem;
+import com.beotkkot.qtudy.dto.response.ResponseDto;
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import java.util.List;
+
+
+@Getter
+public class GetCommentsAllResponseDto extends ResponseDto {
+    private int page;
+    private List<CommentListItem> commentList;
+
+    public GetCommentsAllResponseDto(List<CommentListItem> commentListItem, int page) {
+        super(ResponseCode.SUCCESS, ResponseMessage.SUCCESS);
+        this.page = page;
+        this.commentList = commentListItem;
+    }
+
+    public static ResponseEntity<GetCommentsAllResponseDto> success(List<CommentListItem> commentListItem, int page) {
+        GetCommentsAllResponseDto result = new GetCommentsAllResponseDto(commentListItem, page);
+        return ResponseEntity.status(HttpStatus.OK).body(result);
+    }
+
+    public static ResponseEntity<ResponseDto> notExistedPost(){
+        ResponseDto result = new ResponseDto(ResponseCode.NOT_EXISTED_POST, ResponseMessage.NOT_EXISTED_POST);
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(result);
+    }
+}
+
+
+