diff --git a/src/api/service/user-service/index.ts b/src/api/service/user-service/index.ts
index 0113156e..7a1c9440 100644
--- a/src/api/service/user-service/index.ts
+++ b/src/api/service/user-service/index.ts
@@ -34,9 +34,9 @@ export const userServiceRemote = () => ({
 
   // 4. 알림 설정 변경
   updateMyNotification: async (queryParams: UpdateMyNotificationQueryParams) => {
-    return apiV1.patch<User>(
-      `/users/notification?isNotificationEnabled=${queryParams.isNotificationEnabled}`,
-    );
+    return apiV1.patch<User>(`/users/notification`, null, {
+      params: { ...queryParams },
+    });
   },
 
   // 5. 유저 프로필 조회
@@ -50,7 +50,7 @@ export const userServiceRemote = () => ({
   // 7. 닉네임 중복 검사
   getNicknameAvailability: async (queryParams: GetNicknameAvailabilityQueryParams) => {
     return apiV1.get<Availability>(`/users/nickname/availability`, {
-      params: { nickname: queryParams.nickName },
+      params: { ...queryParams },
     });
   },
 
diff --git a/src/components/pages/user/profile/profile-edit-modal/index.test.tsx b/src/components/pages/user/profile/profile-edit-modal/index.test.tsx
index 7553a6ec..bf763d6d 100644
--- a/src/components/pages/user/profile/profile-edit-modal/index.test.tsx
+++ b/src/components/pages/user/profile/profile-edit-modal/index.test.tsx
@@ -1,10 +1,14 @@
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { act, render, screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
+import { delay, http, HttpResponse } from 'msw';
 
+import { API } from '@/api';
 import { ModalProvider } from '@/components/ui';
 import { server } from '@/mock/server';
+import { createMockSuccessResponse } from '@/mock/service/common/common-mock';
 import { mockUserItems } from '@/mock/service/user/user-mock';
+import { User } from '@/types/service/user';
 
 import { ProfileEditModal } from '.';
 
@@ -254,4 +258,152 @@ describe('ProfileEditModal 테스트', () => {
       });
     });
   });
+
+  describe('폼 제출 테스트', () => {
+    describe('닉네임 중복 검사 테스트', () => {
+      test('닉네임 수정 시 닉네임 중복 검사가 실행된다.', async () => {
+        const user = userEvent.setup();
+
+        const getNicknameAvailabilitySpy = jest.spyOn(API.userService, 'getNicknameAvailability');
+
+        await renderWithProviders(<ProfileEditModal user={mockUser} />);
+
+        const nickNameInput = screen.getByDisplayValue(mockUser.nickName);
+        await user.clear(nickNameInput);
+        await user.type(nickNameInput, '새로운 닉네임');
+
+        const submitButton = screen.getByText('수정하기');
+        await user.click(submitButton);
+
+        await waitFor(() => {
+          expect(getNicknameAvailabilitySpy).toHaveBeenCalledWith({ nickName: '새로운 닉네임' });
+        });
+
+        getNicknameAvailabilitySpy.mockRestore();
+      });
+
+      test('중복된 닉네임일 경우 에러 메시지가 표시된다.', async () => {
+        const user = userEvent.setup();
+        await renderWithProviders(<ProfileEditModal user={mockUser} />);
+
+        const nickNameInput = screen.getByDisplayValue(mockUser.nickName);
+        await user.clear(nickNameInput);
+        await user.type(nickNameInput, '페르난도 토레스');
+
+        const submitButton = screen.getByText('수정하기');
+        await user.click(submitButton);
+
+        await waitFor(() => {
+          expect(screen.getByText('이미 사용중인 닉네임 입니다.')).toBeInTheDocument();
+        });
+      });
+
+      test('닉네임이 변경되지 않으면 중복 검사를 하지 않는다.', async () => {
+        const user = userEvent.setup();
+        const getNicknameAvailabilitySpy = jest.spyOn(API.userService, 'getNicknameAvailability');
+
+        await renderWithProviders(<ProfileEditModal user={mockUser} />);
+
+        const prevNickName = mockUser.nickName;
+        const nickNameInput = screen.getByDisplayValue(prevNickName);
+        await user.clear(nickNameInput);
+        await user.type(nickNameInput, prevNickName);
+
+        const submitButton = screen.getByText('수정하기');
+        await user.click(submitButton);
+
+        await waitFor(() => {
+          expect(getNicknameAvailabilitySpy).not.toHaveBeenCalledWith({
+            nickName: prevNickName,
+          });
+        });
+
+        getNicknameAvailabilitySpy.mockRestore();
+      });
+    });
+
+    describe('MBTI 제출 테스트', () => {
+      test('MBTI가 대문자로 변환되어 전송된다.', async () => {
+        const user = userEvent.setup();
+
+        const updateMyInfoSpy = jest.spyOn(API.userService, 'updateMyInfo');
+
+        await renderWithProviders(<ProfileEditModal user={mockUser} />);
+
+        const mbtiInput = screen.getByDisplayValue(mockUser.mbti);
+        await user.clear(mbtiInput);
+        await user.type(mbtiInput, 'enfp');
+
+        const submitButton = screen.getByText('수정하기');
+        await user.click(submitButton);
+
+        await waitFor(() => {
+          expect(updateMyInfoSpy).toHaveBeenCalledWith({ mbti: 'ENFP' });
+        });
+
+        updateMyInfoSpy.mockRestore();
+      });
+    });
+
+    describe('API 호출 테스트', () => {
+      test('이미지가 변경되지 않으면 updateMyImage API가 호출되지 않는다.', async () => {
+        const user = userEvent.setup();
+
+        const updateMyImageSpy = jest.spyOn(API.userService, 'updateMyImage');
+
+        await renderWithProviders(<ProfileEditModal user={mockUser} />);
+
+        const nickNameInput = screen.getByDisplayValue(mockUser.nickName);
+        await user.clear(nickNameInput);
+        await user.type(nickNameInput, '새로운 닉네임');
+
+        const messageInput = screen.getByDisplayValue(mockUser.profileMessage);
+        await user.clear(messageInput);
+        await user.type(messageInput, '새로운 소개글');
+
+        const mbtiInput = screen.getByDisplayValue(mockUser.mbti);
+        await user.clear(mbtiInput);
+        await user.type(mbtiInput, 'ISTJ');
+
+        const submitButton = screen.getByText('수정하기');
+        await user.click(submitButton);
+
+        await waitFor(() => {
+          expect(updateMyImageSpy).not.toHaveBeenCalled();
+        });
+
+        updateMyImageSpy.mockRestore();
+      });
+    });
+
+    describe('제출 버튼 상태 테스트', () => {
+      test('제출 중일 때 버튼이 "수정 중..."으로 변경되며 비활성화 된다', async () => {
+        server.use(
+          http.patch(`*/users/profile`, async ({ request }) => {
+            await delay(200);
+            const body = (await request.json()) as User;
+            return HttpResponse.json(
+              createMockSuccessResponse({
+                ...mockUserItems[0],
+                ...body,
+              }),
+            );
+          }),
+        );
+
+        const user = userEvent.setup();
+
+        await renderWithProviders(<ProfileEditModal user={mockUser} />);
+
+        const mbtiInput = screen.getByDisplayValue(mockUser.mbti);
+        await user.clear(mbtiInput);
+        await user.type(mbtiInput, 'enfp');
+
+        const submitButton = screen.getByText('수정하기');
+        await user.click(submitButton);
+
+        expect(await screen.findByRole('button', { name: '수정 중...' })).toBeDisabled();
+      });
+    });
+  });
 });
diff --git a/src/components/pages/user/profile/profile-edit-modal/index.tsx b/src/components/pages/user/profile/profile-edit-modal/index.tsx
index 9edc200e..ff478cd1 100644
--- a/src/components/pages/user/profile/profile-edit-modal/index.tsx
+++ b/src/components/pages/user/profile/profile-edit-modal/index.tsx
@@ -50,7 +50,7 @@ export const ProfileEditModal = ({ user }: Props) => {
           return {
             form: '입력값을 확인해주세요',
             fields: {
-              nickName: { message: '이미 사용 중인 닉네임입니다' },
+              nickName: { message: '이미 사용중인 닉네임 입니다.' },
             },
           };
         }
diff --git a/src/mock/service/user/user-handler.ts b/src/mock/service/user/user-handler.ts
index 7ac5b713..f09cbc48 100644
--- a/src/mock/service/user/user-handler.ts
+++ b/src/mock/service/user/user-handler.ts
@@ -5,6 +5,62 @@ import { User } from '@/types/service/user';
 import { createMockErrorResponse, createMockSuccessResponse } from '../common/common-mock';
 import { mockUserItems } from './user-mock';
 
+// 1. 팔로우 등록 모킹
+const followUserMock = http.post(`*/users/follow`, async ({ request }) => {
+  const url = new URL(request.url);
+  const followNickname = url.searchParams.get('followNickname');
+  const user = mockUserItems.find((v) => v.nickName === followNickname);
+
+  if (user?.isFollow === false) {
+    return HttpResponse.json(createMockSuccessResponse('팔로우 성공'));
+  }
+
+  if (user?.isFollow === null) {
+    return HttpResponse.json(
+      createMockErrorResponse({
+        status: 400,
+        detail: '회원 : 자기 자신을 팔로우할 수 없습니다.',
+        errorCode: 'NOT_SAME_FOLLOW',
+      }),
+    );
+  }
+
+  if (user?.isFollow === true) {
+    return HttpResponse.json(
+      createMockErrorResponse({
+        status: 400,
+        detail: '회원 : 이미 팔로우 중입니다.',
+        errorCode: 'ALREADY_EXIST_FOLLOW',
+      }),
+    );
+  }
+});
+
+// 2. 유저 프로필 변경 모킹
+const updateUserItemMock = http.patch(`*/users/profile`, async ({ request }) => {
+  const body = (await request.json()) as User;
+  return HttpResponse.json(
+    createMockSuccessResponse({
+      ...mockUserItems[0],
+      ...body,
+    }),
+  );
+});
+
+// 4. 알림 설정 변경 모킹
+const updateMyNotificationMock = http.patch(`*/users/notification`, async ({ request }) => {
+  const url = new URL(request.url);
+  const isNotificationEnabled = url.searchParams.get('isNotificationEnabled');
+
+  return HttpResponse.json(
+    createMockSuccessResponse({
+      ...mockUserItems[0],
+      isNotificationEnabled: !!isNotificationEnabled,
+    }),
+  );
+});
+
+// 5. 유저 프로필 조회 모킹
 const getUserItemMock = http.get(`*/users/:userId`, ({ params }) => {
   const id = Number(params.userId);
   const user = mockUserItems.find((item) => item.userId === id);
@@ -23,39 +79,74 @@ const getUserItemMock = http.get(`*/users/:userId`, ({ params }) => {
   return HttpResponse.json(createMockSuccessResponse(user));
 });
 
+// 7. 닉네임 중복 검사 모킹
+const getNicknameAvailabilityMock = http.get(`*/users/nickname/availability`, ({ request }) => {
+  const url = new URL(request.url);
+  const nickname = url.searchParams.get('nickname');
+  const user = mockUserItems.find((item) => item.nickName === nickname);
+  return HttpResponse.json(
+    createMockSuccessResponse({
+      data: { available: !user },
+    }),
+  );
+});
+
+// 8. 본인 프로필 조회 모킹
 const getMeItemMock = http.get(`*/users/me`, () => {
   const id = 1;
   const user = mockUserItems.find((item) => item.userId === id);
   return HttpResponse.json(createMockSuccessResponse(user));
 });
 
-const updateUserItemMock = http.patch(`*/users`, async ({ request }) => {
-  const body = (await request.json()) as User;
+// 7. 닉네임 중복 검사 모킹
+const getEmailAvailabilityMock = http.get(`*/users/email/availability`, ({ request }) => {
+  const url = new URL(request.url);
+  const email = url.searchParams.get('email');
+  const user = mockUserItems.find((item) => item.email === email);
   return HttpResponse.json(
     createMockSuccessResponse({
-      ...mockUserItems[0],
-      ...body,
+      data: { available: !user },
     }),
   );
 });
 
-const deleteUserItemMock = http.delete(`*/users`, async () => {
-  return HttpResponse.json(createMockSuccessResponse(null));
-});
+const unfollowUserMock = http.delete(`*/users/unfollow`, ({ request }) => {
+  const url = new URL(request.url);
+  const unFollowNickname = url.searchParams.get('unFollowNickname');
+  const user = mockUserItems.find((v) => v.nickName === unFollowNickname);
 
-const followUserItemMock = http.post(`*/follows`, async () => {
-  return HttpResponse.json(createMockSuccessResponse(null));
-});
+  if (user?.isFollow === false) {
+    return HttpResponse.json(createMockSuccessResponse('팔로우 취소 성공'));
+  }
+
+  if (user?.isFollow === null) {
+    return HttpResponse.json(
+      createMockErrorResponse({
+        status: 400,
+        detail: '회원 : 팔로우 취소 대상은 본인 될 수 없습니다.',
+        errorCode: 'NOT_SAME_FOLLOW',
+      }),
+    );
+  }
 
-const unfollowUserItemMock = http.delete(`*/follows/:followId`, async () => {
-  return HttpResponse.json(createMockSuccessResponse(null));
+  if (user?.isFollow === true) {
+    return HttpResponse.json(
+      createMockErrorResponse({
+        status: 400,
+        detail: '회원 : 팔로우 관계를 찾을 수 없습니다.',
+        errorCode: 'NOT_FOUND_FOLLOW',
+      }),
+    );
+  }
 });
 
 export const userHandlers = [
+  followUserMock,
   getUserItemMock,
+  updateMyNotificationMock,
   getMeItemMock,
   updateUserItemMock,
-  deleteUserItemMock,
-  followUserItemMock,
-  unfollowUserItemMock,
+  getNicknameAvailabilityMock,
+  getEmailAvailabilityMock,
+  unfollowUserMock,
 ];