diff --git a/src/main/server/file.ts b/src/main/server/file.ts
index 1ef76ca7..b19420b7 100644
--- a/src/main/server/file.ts
+++ b/src/main/server/file.ts
@@ -248,9 +248,33 @@ export async function checkHash (repo: string, p: string, oldHash: string) {
   return oldHash === await hash(repo, p)
 }
 
-export async function upload (repo: string, buffer: Buffer, path: string) {
+export async function upload (repo: string, buffer: Buffer, filePath: string, ifExists: 'rename' | 'overwrite' | 'skip' | 'error' = 'error'): Promise<{ path: string, hash: string }> {
   if (readonly) throw new Error('Readonly')
-  await write(repo, path, buffer)
+
+  let newFilePath = filePath
+
+  if (await exists(repo, filePath)) {
+    if (ifExists === 'overwrite') {
+      // do nothing
+    } else if (ifExists === 'skip') {
+      return { path: filePath, hash: await hash(repo, filePath) }
+    } else if (ifExists === 'rename') {
+      const dir = path.dirname(filePath)
+      const ext = path.extname(filePath)
+      const base = path.basename(filePath, ext)
+
+      let i = 1
+      while (await exists(repo, newFilePath)) {
+        i++
+        const seq = i > 100 ? Math.floor(Math.random() * 1000000) : i
+        newFilePath = path.join(dir, base + `-${seq}` + ext)
+      }
+    } else {
+      throw new Error('File exists')
+    }
+  }
+
+  return { path: newFilePath, hash: await write(repo, newFilePath, buffer) }
 }
 
 function getRelativePath (from: string, to: string) {
diff --git a/src/main/server/index.ts b/src/main/server/index.ts
index 0825e7cd..5851e11f 100644
--- a/src/main/server/index.ts
+++ b/src/main/server/index.ts
@@ -206,9 +206,10 @@ const attachment = async (ctx: any, next: any) => {
       const path = ctx.request.body.path
       const repo = ctx.request.body.repo
       const attachment = ctx.request.body.attachment
+      const exists = ctx.request.body.exists
       const buffer = Buffer.from(attachment.substring(attachment.indexOf(',') + 1), 'base64')
-      await file.upload(repo, buffer, path)
-      ctx.body = result('ok', 'success', path)
+      const res = await file.upload(repo, buffer, path, exists)
+      ctx.body = result('ok', 'success', res)
     } else if (ctx.method === 'GET') {
       let { repo, path } = ctx.query
 
diff --git a/src/renderer/services/base.ts b/src/renderer/services/base.ts
index a0ddcc56..0c1a6578 100644
--- a/src/renderer/services/base.ts
+++ b/src/renderer/services/base.ts
@@ -48,7 +48,7 @@ export function getAttachmentURL (doc: Doc, opts: { origin: boolean } = { origin
  * @param name filename
  * @returns
  */
-export async function upload (file: File, belongDoc: Pick<Doc, 'repo' | 'path'>, name?: string) {
+export async function upload (file: File, belongDoc: Pick<Doc, 'repo' | 'path'>, name?: string, ifExists: 'rename' | 'overwrite' | 'skip' | 'error' = 'rename'): Promise<string> {
   if (FLAG_DEMO) {
     return Promise.resolve(URL.createObjectURL(file))
   }
@@ -67,11 +67,13 @@ export async function upload (file: File, belongDoc: Pick<Doc, 'repo' | 'path'>,
     .replaceAll('{date}', dayjs().format('YYYY-MM-DD'))
     .replaceAll('{docHash}', binMd5(parentNameWithoutMdExt).slice(0, 8))
 
-  const path: string = resolve(parentPath, assetsDir, filename)
+  let path: string = resolve(parentPath, assetsDir, filename)
 
   logger.debug('upload', belongDoc, file, path)
 
-  await api.upload(belongDoc.repo, fileBase64Url, path)
+  const res = await api.upload(belongDoc.repo, fileBase64Url, path, ifExists)
+
+  path = res.data.path
 
   if (
     assetsPathType === 'relative' ||
diff --git a/src/renderer/support/api.ts b/src/renderer/support/api.ts
index 22d97987..b606778f 100644
--- a/src/renderer/support/api.ts
+++ b/src/renderer/support/api.ts
@@ -393,12 +393,14 @@ export async function watchFs (
  * @param repo
  * @param fileBase64Url
  * @param filePath
+ * @param ifExists
  */
-export async function upload (repo: string, fileBase64Url: string, filePath: string): Promise<ApiResult<any>> {
+export async function upload (repo: string, fileBase64Url: string, filePath: string, ifExists: 'rename' | 'overwrite' | 'skip' | 'error' = 'rename'): Promise<ApiResult<{ path: string, hash: string }>> {
   const formData = new FormData()
   formData.append('repo', repo)
   formData.append('path', filePath)
   formData.append('attachment', fileBase64Url)
+  formData.append('exists', ifExists)
 
   return fetchHttp('/api/attachment', { method: 'POST', body: formData })
 }