diff --git a/apps/common/features/src/entities/comment/api/comment-service.ts b/apps/common/features/src/entities/comment/api/comment-service.ts
index 7fb0b5655..a4001301d 100644
--- a/apps/common/features/src/entities/comment/api/comment-service.ts
+++ b/apps/common/features/src/entities/comment/api/comment-service.ts
@@ -2,11 +2,13 @@ import { client } from "@/shared/api";
 import { ENDPOINT } from "@/shared/config";
 import {
   commentFormSchema,
+  commentUpdateFormSchema,
   type Comment,
   type CommentService,
   type CommentList,
   type CommentParams,
   type CommentFormData,
+  type CommentUpdateFormData,
 } from "../model/comment-interface";
 
 export class CommentApiService implements CommentService {
@@ -26,6 +28,32 @@ export class CommentApiService implements CommentService {
     );
     return response.data;
   }
+
+  public async updateComment(
+    bbsId: number,
+    pstNo: number,
+    cmntNo: number,
+    data: CommentUpdateFormData,
+  ): Promise<Comment> {
+    const validatedData = commentUpdateFormSchema.parse(data);
+    const response = await client.put<Comment>(
+      `${ENDPOINT.BOARD_SERVICE.POSTS_COMMENTS}/${bbsId}/${pstNo}/${cmntNo}`,
+      validatedData,
+    );
+    return response.data;
+  }
+
+  public async deleteComment(
+    bbsId: number,
+    pstNo: number,
+    cmntNo: number,
+    cmntPswd: string,
+  ): Promise<Comment> {
+    const response = await client.delete<Comment>(
+      `${ENDPOINT.BOARD_SERVICE.POSTS_COMMENTS}/${bbsId}/${pstNo}/${cmntNo}?cmntPswd=${cmntPswd}`,
+    );
+    return response.data;
+  }
 }
 
 export const CommentApi = new CommentApiService();
diff --git a/apps/common/features/src/entities/comment/index.ts b/apps/common/features/src/entities/comment/index.ts
index 376ec62e4..0b3c0f660 100644
--- a/apps/common/features/src/entities/comment/index.ts
+++ b/apps/common/features/src/entities/comment/index.ts
@@ -6,4 +6,5 @@ export {
   type CommentList,
   type CommentParams,
   type CommentFormData,
+  type CommentUpdateFormData,
 } from "./model/comment-interface";
diff --git a/apps/common/features/src/entities/comment/model/comment-interface.ts b/apps/common/features/src/entities/comment/model/comment-interface.ts
index ea22af65b..9023346af 100644
--- a/apps/common/features/src/entities/comment/model/comment-interface.ts
+++ b/apps/common/features/src/entities/comment/model/comment-interface.ts
@@ -18,6 +18,7 @@ export interface Comment {
   rgtr: string;
   mdfcnDt: string;
   mdfr: string;
+  delYn: string;
 }
 
 export const commentFormSchema = z.object({
@@ -39,16 +40,16 @@ export type CommentUpdateFormData = z.infer<typeof commentUpdateFormSchema>;
 export interface CommentService {
   getComments(params: CommentParams): Promise<CommentList>;
   createComment(data: CommentFormData): Promise<Comment>;
-  // updateComment(
-  //   bbsId: number,
-  //   pstNo: number,
-  //   cmntNo: number,
-  //   data: CommentUpdateFormData,
-  // ): Promise<Comment>;
-  // deleteComment(
-  //   bbsId: number,
-  //   pstNo: number,
-  //   cmntNo: number,
-  //   cmntPswd: string,
-  // ): Promise<void>;
+  updateComment(
+    bbsId: number,
+    pstNo: number,
+    cmntNo: number,
+    data: CommentUpdateFormData,
+  ): Promise<Comment>;
+  deleteComment(
+    bbsId: number,
+    pstNo: number,
+    cmntNo: number,
+    cmntPswd: string,
+  ): Promise<Comment>;
 }
diff --git a/apps/common/features/src/widgets/post/ui/post-comment.tsx b/apps/common/features/src/widgets/post/ui/post-comment.tsx
index b7a55a6ca..0bddc1e81 100644
--- a/apps/common/features/src/widgets/post/ui/post-comment.tsx
+++ b/apps/common/features/src/widgets/post/ui/post-comment.tsx
@@ -1,21 +1,28 @@
 import dayjs from "dayjs";
+import { useState } from "react";
 import { useForm } from "react-hook-form";
 import { zodResolver } from "@hookform/resolvers/zod";
+import { useConfirm } from "@frontend-opensource/use-react-hooks";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { Button, Input, Textarea } from "@common/components";
 import {
   CommentApi,
   commentFormSchema,
   type CommentFormData,
+  type CommentUpdateFormData,
 } from "@/entities/comment";
-import { Form, FormControl, FormField, FormItem } from "@/shared/ui/form";
-import { useAlertStore, useUserStore } from "@/shared/lib";
 import { ENDPOINT } from "@/shared/config";
+import { useAlertStore, usePrompt, useUserStore } from "@/shared/lib";
+import { Form, FormControl, FormField, FormItem } from "@/shared/ui/form";
 
-function PostComment({ pstNo }: { pstNo: number }) {
+function PostComment({ bbsId, pstNo }: { bbsId: number; pstNo: number }) {
+  const { prompt } = usePrompt();
+  const { confirm } = useConfirm();
   const queryClient = useQueryClient();
-  const { setMessage: alert } = useAlertStore((state) => state);
   const { userInfo } = useUserStore((state) => state);
+  const { setMessage: alert } = useAlertStore((state) => state);
+  const [editingCmntNo, setEditingCmntNo] = useState<number | null>(null);
+  const [editValue, setEditValue] = useState<string>("");
 
   const { data: comments } = useQuery({
     queryKey: [ENDPOINT.BOARD_SERVICE.POSTS_COMMENTS, pstNo],
@@ -26,7 +33,7 @@ function PostComment({ pstNo }: { pstNo: number }) {
   const { mutate: createComment } = useMutation({
     mutationFn: (data: CommentFormData) => CommentApi.createComment(data),
     onSuccess: () => {
-      alert("댓글이 등록되었습니다.");
+      alert("등록되었습니다.");
       form.setValue("cmntCn", "");
       queryClient.invalidateQueries({
         queryKey: [ENDPOINT.BOARD_SERVICE.POSTS_COMMENTS],
@@ -34,6 +41,35 @@ function PostComment({ pstNo }: { pstNo: number }) {
     },
   });
 
+  const { mutate: updateComment } = useMutation({
+    mutationFn: ({
+      cmntNo,
+      data,
+    }: {
+      cmntNo: number;
+      data: CommentUpdateFormData;
+    }) => CommentApi.updateComment(bbsId, pstNo, cmntNo, data),
+    onSuccess: () => {
+      alert("수정되었습니다.");
+      setEditingCmntNo(null);
+      setEditValue("");
+      queryClient.invalidateQueries({
+        queryKey: [ENDPOINT.BOARD_SERVICE.POSTS_COMMENTS],
+      });
+    },
+  });
+
+  const { mutate: deleteComment } = useMutation({
+    mutationFn: ({ cmntNo, cmntPswd }: { cmntNo: number; cmntPswd: string }) =>
+      CommentApi.deleteComment(bbsId, pstNo, cmntNo, cmntPswd),
+    onSuccess: () => {
+      alert("삭제되었습니다.");
+      queryClient.invalidateQueries({
+        queryKey: [ENDPOINT.BOARD_SERVICE.POSTS_COMMENTS],
+      });
+    },
+  });
+
   const form = useForm<CommentFormData>({
     resolver: zodResolver(commentFormSchema),
     values: {
@@ -48,6 +84,35 @@ function PostComment({ pstNo }: { pstNo: number }) {
     createComment(data);
   };
 
+  const getCommentPassword = async () => {
+    let cmntPswd = "";
+    if (userInfo?.userUnqId) {
+      cmntPswd = userInfo?.userUnqId;
+    } else {
+      cmntPswd = await prompt("비밀번호를 입력해주세요.");
+    }
+    return cmntPswd;
+  };
+
+  const handleUpdateComment = async (cmntNo: number, wrtrNm: string) => {
+    if (!(await confirm("수정하시겠습니까?"))) return;
+    const cmntPswd = await getCommentPassword();
+    updateComment({
+      cmntNo,
+      data: {
+        cmntCn: editValue,
+        wrtrNm,
+        cmntPswd,
+      },
+    });
+  };
+
+  const handleDeleteComment = async (cmntNo: number) => {
+    if (!(await confirm("삭제하시겠습니까?"))) return;
+    const cmntPswd = await getCommentPassword();
+    deleteComment({ cmntNo, cmntPswd });
+  };
+
   return (
     <div className="card card-border !p-8">
       <Form {...form}>
@@ -113,32 +178,77 @@ function PostComment({ pstNo }: { pstNo: number }) {
         </form>
       </Form>
       <div className="mt-8 flex flex-col">
-        {comments?.content.map((comment) => (
-          <div
-            className="flex justify-between gap-2 border-t border-gray-200 py-8"
-            key={comment.cmntNo}
-          >
-            <div className="flex gap-10">
-              <div className="flex w-[10rem] shrink-0 flex-col">
-                <span className="text-[1.4rem] font-bold">
-                  {comment.wrtrNm}
-                </span>
-                <span className="text-[1.2rem] text-gray-500">
-                  {dayjs(comment.regDt).format("YYYY.MM.DD")}
-                </span>
+        {comments?.content.map((comment) => {
+          if (comment.delYn === "Y") return null;
+          return (
+            <div
+              className="flex justify-between gap-2 border-t border-gray-200 py-8"
+              key={comment.cmntNo}
+            >
+              <div className="flex w-full gap-10">
+                <div className="flex w-[10rem] shrink-0 flex-col">
+                  <span className="text-[1.4rem] font-bold">
+                    {comment.wrtrNm}
+                  </span>
+                  <span className="text-[1.2rem] text-gray-500">
+                    {dayjs(comment.regDt).format("YYYY.MM.DD")}
+                  </span>
+                </div>
+                {editingCmntNo === comment.cmntNo ? (
+                  <div className="flex flex-1 flex-col gap-2">
+                    <Textarea
+                      value={editValue}
+                      onChange={(e) => setEditValue(e.target.value)}
+                      maxLength={1000}
+                      className="h-[10rem] bg-background p-4 !text-[1.3rem] !leading-6"
+                    />
+                    <div className="flex gap-2">
+                      <Button
+                        size="sm"
+                        onClick={() =>
+                          handleUpdateComment(comment.cmntNo, comment.wrtrNm)
+                        }
+                      >
+                        저장
+                      </Button>
+                      <Button
+                        size="sm"
+                        color="gray"
+                        onClick={() => {
+                          setEditingCmntNo(null);
+                          setEditValue("");
+                        }}
+                      >
+                        취소
+                      </Button>
+                    </div>
+                  </div>
+                ) : (
+                  <p className="break-all text-[1.4rem]">{comment.cmntCn}</p>
+                )}
+              </div>
+              <div className="flex gap-2 whitespace-nowrap">
+                <Button
+                  size="icon"
+                  color="white"
+                  onClick={() => {
+                    setEditingCmntNo(comment.cmntNo);
+                    setEditValue(comment.cmntCn);
+                  }}
+                >
+                  <i className="diveicon di-pencil" />
+                </Button>
+                <Button
+                  size="icon"
+                  color="white"
+                  onClick={() => handleDeleteComment(comment.cmntNo)}
+                >
+                  <i className="diveicon di-trash" />
+                </Button>
               </div>
-              <p className="break-all text-[1.4rem]">{comment.cmntCn}</p>
             </div>
-            <div className="flex gap-2 whitespace-nowrap">
-              <Button size="icon" color="white">
-                <i className="diveicon di-pencil" />
-              </Button>
-              <Button size="icon" color="white">
-                <i className="diveicon di-trash" />
-              </Button>
-            </div>
-          </div>
-        ))}
+          );
+        })}
       </div>
     </div>
   );
diff --git a/apps/common/features/src/widgets/post/ui/post.tsx b/apps/common/features/src/widgets/post/ui/post.tsx
index 4a199af84..adc3a0973 100644
--- a/apps/common/features/src/widgets/post/ui/post.tsx
+++ b/apps/common/features/src/widgets/post/ui/post.tsx
@@ -131,7 +131,7 @@ function Post({ bbsId, pstNo }: { bbsId: string; pstNo: string }) {
           </div>
         </div>
       </PostAction>
-      <PostComment pstNo={parseInt(pstNo)} />
+      <PostComment bbsId={parseInt(bbsId)} pstNo={parseInt(pstNo)} />
     </>
   );
 }