diff --git a/actions/news.ts b/actions/news.ts
index 2d5dd10b4..333cf2955 100644
--- a/actions/news.ts
+++ b/actions/news.ts
@@ -7,16 +7,19 @@ import { deleteNews, patchNews, postNews } from '@/apis/news';
 
 import { getPath } from '@/utils/page';
 import { news } from '@/utils/segmentNode';
+import { decodeFormDataFileName } from '@/utils/string';
 
 const newsPath = getPath(news);
 
 export const postNewsAction = async (formData: FormData) => {
-  await postNews(formData);
+  decodeFormDataFileName(formData, 'attachments');
+  const resp = await postNews(formData);
   revalidateNewsTag();
-  redirect(newsPath);
+  redirect(`${newsPath}/${resp.id}`);
 };
 
 export const patchNewsAction = async (id: number, formData: FormData) => {
+  decodeFormDataFileName(formData, 'newAttachments');
   await patchNews(id, formData);
   revalidateNewsTag();
   redirect(`${newsPath}/${id}`);
diff --git a/actions/notice.ts b/actions/notice.ts
index 935a74f20..71f6635d8 100644
--- a/actions/notice.ts
+++ b/actions/notice.ts
@@ -14,16 +14,19 @@ import {
 import { errorToStr } from '@/utils/error';
 import { getPath } from '@/utils/page';
 import { notice } from '@/utils/segmentNode';
+import { decodeFormDataFileName } from '@/utils/string';
 
 const noticePath = getPath(notice);
 
 export const postNoticeAction = async (formData: FormData) => {
-  await postNotice(formData);
+  decodeFormDataFileName(formData, 'attachments');
+  const resp = await postNotice(formData);
   revalidateNoticeTag();
-  redirect(noticePath);
+  redirect(`${noticePath}/${resp.id}`);
 };
 
 export const patchNoticeAction = async (id: number, formData: FormData) => {
+  decodeFormDataFileName(formData, 'newAttachments');
   await patchNotice(id, formData);
   revalidateNoticeTag();
   redirect(`${noticePath}/${id}`);
diff --git a/actions/seminar.ts b/actions/seminar.ts
index d93c94f5c..f579cda4b 100644
--- a/actions/seminar.ts
+++ b/actions/seminar.ts
@@ -7,16 +7,19 @@ import { deleteSeminar, patchSeminar, postSeminar } from '@/apis/seminar';
 
 import { getPath } from '@/utils/page';
 import { seminar } from '@/utils/segmentNode';
+import { decodeFormDataFileName } from '@/utils/string';
 
 const seminarPath = getPath(seminar);
 
 export const postSeminarAction = async (formData: FormData) => {
-  await postSeminar(formData);
+  decodeFormDataFileName(formData, 'attachments');
+  const resp = await postSeminar(formData);
   revalidateSeminarTag();
-  redirect(seminarPath);
+  redirect(`${seminarPath}/${resp.id}`);
 };
 
 export const patchSeminarAction = async (id: number, formData: FormData) => {
+  decodeFormDataFileName(formData, 'newAttachments');
   await patchSeminar(id, formData);
   revalidateSeminarTag();
   redirect(`${seminarPath}/${id}`);
diff --git a/apis/news.ts b/apis/news.ts
index c40d5ce02..cb0e5d3c5 100644
--- a/apis/news.ts
+++ b/apis/news.ts
@@ -18,7 +18,7 @@ export const getNewsDetail = (id: number, params?: PostSearchQueryParams) =>
 // POST
 
 export const postNews = async (formData: FormData) => {
-  await postRequest(newsPath, { body: formData });
+  return postRequest(newsPath, { body: formData }) as Promise<{ id: number }>;
 };
 
 // PATCH
diff --git a/apis/notice.ts b/apis/notice.ts
index d59fca15a..ee652a9be 100644
--- a/apis/notice.ts
+++ b/apis/notice.ts
@@ -18,7 +18,7 @@ export const getNoticePostDetail = (id: number, params: PostSearchQueryParams) =
 // POST
 
 export const postNotice = async (formData: FormData) => {
-  await postRequest('/notice', { body: formData });
+  return postRequest('/notice', { body: formData }) as Promise<{ id: number }>;
 };
 
 // PATCH
diff --git a/apis/seminar.ts b/apis/seminar.ts
index f09aedb44..f9e73617c 100644
--- a/apis/seminar.ts
+++ b/apis/seminar.ts
@@ -10,17 +10,21 @@ const seminarPath = '/seminar';
 // GET
 
 export const getSeminarPosts = async (params: PostSearchQueryParams) => {
-  return await getRequest<SeminarList>(seminarPath, params, { next: { tags: ['seminar'] } });
+  return getRequest(seminarPath, params, {
+    next: { tags: ['seminar'] },
+  }) as Promise<SeminarList>;
 };
 
 export const getSeminarPost = async (id: number, params: PostSearchQueryParams) => {
-  return await getRequest<Seminar>(`${seminarPath}/${id}`, params, { next: { tags: ['seminar'] } });
+  return getRequest(`${seminarPath}/${id}`, params, {
+    next: { tags: ['seminar'] },
+  }) as Promise<Seminar>;
 };
 
 // POST
 
 export const postSeminar = async (formData: FormData) => {
-  await postRequest(seminarPath, { body: formData });
+  return postRequest(seminarPath, { body: formData }) as Promise<{ id: number }>;
 };
 
 // PATCH
diff --git a/app/[locale]/admin/page.tsx b/app/[locale]/admin/page.tsx
index 0faf91fd8..47d2a93d1 100644
--- a/app/[locale]/admin/page.tsx
+++ b/app/[locale]/admin/page.tsx
@@ -35,6 +35,7 @@ const getAdminData = async (selectedMenu: string, pageNum: number) => {
 export default function AdminPage({ searchParams: { selected, page } }: AdminPageProps) {
   const selectedMenu = selected ? replaceDashWithSpace(selected) : DEFAULT_MENU;
   const pageNum = (page && parseInt(page)) || 1;
+
   const { data } = useSWR(['/admin', selectedMenu, pageNum], () =>
     getAdminData(selectedMenu, pageNum),
   );
diff --git a/app/[locale]/community/news/[id]/edit/EditNewsPageContent.tsx b/app/[locale]/community/news/[id]/edit/EditNewsPageContent.tsx
index 7efbca4b3..bc89d3bf7 100644
--- a/app/[locale]/community/news/[id]/edit/EditNewsPageContent.tsx
+++ b/app/[locale]/community/news/[id]/edit/EditNewsPageContent.tsx
@@ -21,6 +21,7 @@ import { News } from '@/types/news';
 import { validateNewsForm } from '@/utils/formValidation';
 import { getPath } from '@/utils/page';
 import { news } from '@/utils/segmentNode';
+import { encodeFormDataFileName } from '@/utils/string';
 
 const newsPath = getPath(news);
 
@@ -110,13 +111,12 @@ const contentToFormData = (prevNews: News, content: PostEditorContent) => {
     ),
   );
 
+  // TOOD: 이미지 이름 깨지는지 확인
   if (mainImage) {
     formData.append('newMainImage', mainImage);
   }
 
-  for (const attachment of localAttachments) {
-    formData.append('newAttachments', attachment);
-  }
+  encodeFormDataFileName(formData, 'newAttachments', localAttachments);
 
   return formData;
 };
diff --git a/app/[locale]/community/news/create/page.tsx b/app/[locale]/community/news/create/page.tsx
index 686104ecc..b2a2202ba 100644
--- a/app/[locale]/community/news/create/page.tsx
+++ b/app/[locale]/community/news/create/page.tsx
@@ -12,6 +12,7 @@ import { NEWS_TAGS } from '@/constants/tag';
 import { validateNewsForm } from '@/utils/formValidation';
 import { getPath } from '@/utils/page';
 import { news } from '@/utils/segmentNode';
+import { encodeFormDataFileName } from '@/utils/string';
 
 const newsPath = getPath(news);
 
@@ -72,9 +73,11 @@ const contentToFormData = (content: PostEditorContent) => {
     formData.append('mainImage', content.mainImage.file);
   }
 
-  for (const attachment of content.attachments.filter(isLocalFile).map((x) => x.file)) {
-    formData.append('attachments', attachment);
-  }
+  encodeFormDataFileName(
+    formData,
+    'attachments',
+    content.attachments.filter(isLocalFile).map((x) => x.file),
+  );
 
   return formData;
 };
diff --git a/app/[locale]/community/notice/[id]/edit/EditNoticePageContent.tsx b/app/[locale]/community/notice/[id]/edit/EditNoticePageContent.tsx
index 3c26fe85a..d0e679a7b 100644
--- a/app/[locale]/community/notice/[id]/edit/EditNoticePageContent.tsx
+++ b/app/[locale]/community/notice/[id]/edit/EditNoticePageContent.tsx
@@ -20,6 +20,7 @@ import { Notice } from '@/types/notice';
 import { validateNoticeForm } from '@/utils/formValidation';
 import { getPath } from '@/utils/page';
 import { notice } from '@/utils/segmentNode';
+import { encodeFormDataFileName } from '@/utils/string';
 import { errorToast, successToast } from '@/utils/toast';
 
 const noticePath = getPath(notice);
@@ -109,9 +110,7 @@ const contentToFormData = (prevNotice: Notice, content: PostEditorContent) => {
     ),
   );
 
-  for (const attachment of localAttachments) {
-    formData.append('newAttachments', attachment);
-  }
+  encodeFormDataFileName(formData, 'newAttachments', localAttachments);
 
   return formData;
 };
diff --git a/app/[locale]/community/notice/create/page.tsx b/app/[locale]/community/notice/create/page.tsx
index b39fe6776..f0a14f5f7 100644
--- a/app/[locale]/community/notice/create/page.tsx
+++ b/app/[locale]/community/notice/create/page.tsx
@@ -13,6 +13,7 @@ import { NOTICE_TAGS } from '@/constants/tag';
 import { validateNoticeForm } from '@/utils/formValidation';
 import { getPath } from '@/utils/page';
 import { notice } from '@/utils/segmentNode';
+import { encodeFormDataFileName } from '@/utils/string';
 
 const noticePath = getPath(notice);
 
@@ -66,10 +67,11 @@ const contentToForm = (content: PostEditorContent) => {
     ),
   );
 
-  content.attachments
-    .filter(isLocalFile)
-    .map((x) => x.file)
-    .forEach((attachment) => formData.append('attachments', attachment));
+  encodeFormDataFileName(
+    formData,
+    'attachments',
+    content.attachments.filter(isLocalFile).map((x) => x.file),
+  );
 
   return formData;
 };
diff --git a/app/[locale]/community/seminar/[id]/edit/EditSeminarPageContent.tsx b/app/[locale]/community/seminar/[id]/edit/EditSeminarPageContent.tsx
index 5109f44aa..9f954494e 100644
--- a/app/[locale]/community/seminar/[id]/edit/EditSeminarPageContent.tsx
+++ b/app/[locale]/community/seminar/[id]/edit/EditSeminarPageContent.tsx
@@ -14,6 +14,7 @@ import { Seminar } from '@/types/seminar';
 import { validateSeminarForm } from '@/utils/formValidation';
 import { getPath } from '@/utils/page';
 import { seminar } from '@/utils/segmentNode';
+import { encodeFormDataFileName } from '@/utils/string';
 import { errorToast } from '@/utils/toast';
 
 const seminarPath = getPath(seminar);
@@ -124,9 +125,7 @@ const contentToFormData = (prevSeminar: Seminar, content: SeminarEditorContent)
     formData.append('newMainImage', image);
   }
 
-  for (const attachment of localAttachments) {
-    formData.append('newAttachments', attachment);
-  }
+  encodeFormDataFileName(formData, 'newAttachments', localAttachments);
 
   return formData;
 };
diff --git a/app/[locale]/community/seminar/create/page.tsx b/app/[locale]/community/seminar/create/page.tsx
index af8473115..859fc82c8 100644
--- a/app/[locale]/community/seminar/create/page.tsx
+++ b/app/[locale]/community/seminar/create/page.tsx
@@ -12,6 +12,7 @@ import PageLayout from '@/components/layout/pageLayout/PageLayout';
 import { validateSeminarForm } from '@/utils/formValidation';
 import { getPath } from '@/utils/page';
 import { seminar } from '@/utils/segmentNode';
+import { encodeFormDataFileName } from '@/utils/string';
 
 const seminarPath = getPath(seminar);
 
@@ -80,9 +81,7 @@ const contentToFormData = (content: SeminarEditorContent) => {
     formData.append('mainImage', image);
   }
 
-  for (const attachment of attachments) {
-    formData.append('attachments', attachment);
-  }
+  encodeFormDataFileName(formData, 'attachments', attachments);
 
   return formData;
 };
diff --git a/tsconfig.json b/tsconfig.json
index 962d02c4d..f7cf3b890 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "es5",
+    "target": "es6",
     "lib": ["dom", "dom.iterable", "esnext"],
     "allowJs": true,
     "skipLibCheck": true,
diff --git a/utils/string.ts b/utils/string.ts
index c9637cea1..a35be4cd5 100644
--- a/utils/string.ts
+++ b/utils/string.ts
@@ -1,3 +1,25 @@
 export const replaceSpaceWithDash = (words: string) => words.replace(/\s+/g, '-');
 
 export const replaceDashWithSpace = (words: string) => words.replace(/-/g, ' ');
+
+// server action에서 한글 파일이 깨지는 문제가 있어 수동으로 해결
+// TODO: 없어도 되게
+export const decodeFormDataFileName = (formData: FormData, key: FormDataFileName) => {
+  const list = formData.getAll(key);
+  formData.delete(key);
+
+  list.filter(isFile).forEach((file) => formData.append(key, file, decodeURI(file.name)));
+};
+
+// TODO: 없어도 되게
+export const encodeFormDataFileName = (
+  formData: FormData,
+  key: FormDataFileName,
+  fileList: File[],
+) => {
+  fileList.forEach((file) => formData.append(key, file, encodeURI(file.name)));
+};
+
+type FormDataFileName = 'attachments' | 'newAttachments';
+
+const isFile = (x: unknown): x is File => x instanceof File;