diff --git a/src/api/service/group-service/index.ts b/src/api/service/group-service/index.ts
index e08d1892..8f7c6bd1 100644
--- a/src/api/service/group-service/index.ts
+++ b/src/api/service/group-service/index.ts
@@ -1,4 +1,5 @@
-import { api } from '@/api/core';
+import { api, baseAPI } from '@/api/core';
+import { CommonSuccessResponse } from '@/types/service/common';
 import {
   CreateGroupPayload,
   CreateGroupResponse,
@@ -8,6 +9,8 @@ import {
   GetGroupsResponse,
   GetMyGroupsPayload,
   GetMyGroupsResponse,
+  PreUploadGroupImagePayload,
+  PreUploadGroupImageResponse,
 } from '@/types/service/group';
 
 export const groupServiceRemote = () => ({
@@ -36,6 +39,33 @@ export const groupServiceRemote = () => ({
     return api.get<GetMyGroupsResponse>(`/groups/me?${params.toString()}`);
   },
 
+  // 모임 이미지 사전 업로드 (POST /groups/images/upload) - multipart/form-data
+  uploadGroupImages: async (
+    payload: PreUploadGroupImagePayload,
+  ): Promise<PreUploadGroupImageResponse> => {
+    const formData = new FormData();
+    payload.images.forEach((file) => {
+      if (file instanceof File) {
+        formData.append('images', file);
+      } else {
+        console.error('[이미지 업로드 오류] File 객체가 아닌 값이 포함됨:', file);
+        throw new Error('이미지 파일은 File 객체여야 합니다.');
+      }
+    });
+
+    const response = await baseAPI.post<CommonSuccessResponse<PreUploadGroupImageResponse>>(
+      '/groups/images/upload',
+      formData,
+      {
+        headers: {
+          'Content-Type': 'multipart/form-data',
+        },
+      },
+    );
+
+    return response.data.data;
+  },
+
   createGroup: (payload: CreateGroupPayload) => {
     return api.post<CreateGroupResponse>('/groups/groups/create', payload);
   },
diff --git a/src/app/post-meetup/page.tsx b/src/app/post-meetup/page.tsx
index 97e03024..424759e8 100644
--- a/src/app/post-meetup/page.tsx
+++ b/src/app/post-meetup/page.tsx
@@ -12,11 +12,14 @@ import {
   MeetupTagsField,
   MeetupTitleField,
 } from '@/components/pages/post-meetup';
+import { ImageRecord } from '@/components/ui';
 import { useCreateGroup } from '@/hooks/use-group/use-group-create';
+import { useUploadGroupImages } from '@/hooks/use-group/use-upload-group-images';
 import { CreateGroupPayload } from '@/types/service/group';
 
 const PostMeetupPage = () => {
-  const { mutate } = useCreateGroup();
+  const { mutateAsync: createGroup } = useCreateGroup();
+  const { mutateAsync: uploadImages } = useUploadGroupImages();
 
   const form = useForm({
     defaultValues: {
@@ -28,12 +31,43 @@ const PostMeetupPage = () => {
       tags: [] as string[],
       description: '',
       maxParticipants: 0,
-      images: [],
-    } as CreateGroupPayload,
-    onSubmit: ({ value }) => {
-      console.log(value);
-      const res = mutate(value);
-      console.log(res);
+      images: {} as ImageRecord,
+    },
+    onSubmit: async ({ value }) => {
+      const imageRecords = value.images as ImageRecord;
+      const imageFiles = Object.values(imageRecords).filter(
+        (file): file is File => file !== null && file instanceof File,
+      );
+
+      // 이미지가 있으면 먼저 업로드하여 URL 배열 수확
+      let uploadedImages = null;
+      if (imageFiles.length > 0) {
+        const uploadResponse = await uploadImages({ images: imageFiles });
+        uploadedImages = uploadResponse.images;
+      }
+
+      if (!value.startTime) {
+        throw new Error('모임 시작 시간을 입력해주세요.');
+      }
+
+      const maxParticipantsNumber = Number(value.maxParticipants);
+      if (isNaN(maxParticipantsNumber) || maxParticipantsNumber < 1) {
+        throw new Error('모임 최대 인원은 1명 이상이어야 합니다.');
+      }
+
+      const createPayload: CreateGroupPayload = {
+        title: value.title.trim(),
+        location: value.location.trim(),
+        locationDetail: value.locationDetail?.trim() || null,
+        startTime: value.startTime,
+        ...(value.endTime && { endTime: value.endTime }),
+        tags: value.tags && value.tags.length > 0 ? value.tags : null,
+        description: value.description.trim(),
+        maxParticipants: maxParticipantsNumber,
+        images: uploadedImages && uploadedImages.length > 0 ? uploadedImages : null,
+      };
+
+      await createGroup(createPayload);
     },
   });
 
diff --git a/src/components/pages/post-meetup/fields/images-field/index.tsx b/src/components/pages/post-meetup/fields/images-field/index.tsx
index 806fe3a4..a8dda984 100644
--- a/src/components/pages/post-meetup/fields/images-field/index.tsx
+++ b/src/components/pages/post-meetup/fields/images-field/index.tsx
@@ -53,6 +53,7 @@ export const MeetupImagesField = ({ field, initialImages }: Props) => {
                   alt='팀 이미지'
                   fill
                   src={url}
+                  unoptimized={url.startsWith('blob:')}
                 />
                 <button
                   className={cn(
diff --git a/src/hooks/use-group/use-upload-group-images/index.ts b/src/hooks/use-group/use-upload-group-images/index.ts
new file mode 100644
index 00000000..bbd4f885
--- /dev/null
+++ b/src/hooks/use-group/use-upload-group-images/index.ts
@@ -0,0 +1,12 @@
+import { useMutation } from '@tanstack/react-query';
+
+import { API } from '@/api';
+import { PreUploadGroupImagePayload } from '@/types/service/group';
+
+export const useUploadGroupImages = () => {
+  const query = useMutation({
+    mutationFn: (payload: PreUploadGroupImagePayload) =>
+      API.groupService.uploadGroupImages(payload),
+  });
+  return query;
+};