diff --git a/src/components/Settings.tsx b/src/components/Settings.tsx
index 73a18d4..281cd3b 100644
--- a/src/components/Settings.tsx
+++ b/src/components/Settings.tsx
@@ -79,6 +79,7 @@ export const Settings: React.FC<{ permission: permissionLevel }> = ({ permission
   }>({ connected: true, type: "sqlite" })
   const [pgTestLoading, setPgTestLoading] = useState(false)
   const [pgSwitchLoading, setPgSwitchLoading] = useState(false)
+  const [pgUploadLoading, setPgUploadLoading] = useState(false)
 
   const permissionTag = useMemo(() => {
     return (
@@ -360,6 +361,61 @@ export const Settings: React.FC<{ permission: permissionLevel }> = ({ permission
     }
   }
 
+  const uploadLocalToRemote = async () => {
+    if (!(window as any).api) return
+    try {
+      const statusRes = await (window as any).api.dbGetStatus()
+      if (!statusRes.success || !statusRes.data?.connected || statusRes.data?.type !== "postgresql") {
+        messageApi.warning(t("settings.database.uploadNeedRemote"))
+        return
+      }
+
+      const previewRes = await (window as any).api.dbSyncPreview()
+      if (!previewRes.success || !previewRes.data?.can_sync) {
+        messageApi.error(previewRes.message || previewRes.data?.message || t("settings.database.uploadFailed"))
+        return
+      }
+      if (!previewRes.data.need_sync) {
+        messageApi.info(t("settings.database.noNeedUpload"))
+        return
+      }
+
+      Modal.confirm({
+        title: t("settings.database.uploadConfirmTitle"),
+        content: t("settings.database.uploadConfirmContent", {
+          localOnly: previewRes.data.local_only || 0,
+          remoteOnly: previewRes.data.remote_only || 0,
+          conflicts: previewRes.data.conflicts?.length || 0,
+        }),
+        okText: t("settings.database.uploadButton"),
+        cancelText: t("common.cancel"),
+        onOk: async () => {
+          setPgUploadLoading(true)
+          try {
+            const applyRes = await (window as any).api.dbSyncApply("keep_local")
+            if (applyRes.success && applyRes.data?.success) {
+              messageApi.success(
+                applyRes.data?.message || t("settings.database.uploadSuccess")
+              )
+              emitDataUpdated("all")
+              await loadAll()
+            } else {
+              messageApi.error(
+                applyRes.data?.message || applyRes.message || t("settings.database.uploadFailed")
+              )
+            }
+          } catch (e: any) {
+            messageApi.error(e?.message || t("settings.database.uploadFailed"))
+          } finally {
+            setPgUploadLoading(false)
+          }
+        },
+      })
+    } catch (e: any) {
+      messageApi.error(e?.message || t("settings.database.uploadFailed"))
+    }
+  }
+
   const currentYear = new Date().getFullYear()
 
   const tabItems = [
@@ -678,7 +734,17 @@ export const Settings: React.FC<{ permission: permissionLevel }> = ({ permission
               >
                 {t("settings.database.switchToSQLite")}
               </Button>
+              <Button
+                onClick={uploadLocalToRemote}
+                loading={pgUploadLoading}
+                disabled={!canAdmin || pgConnectionStatus.type !== "postgresql"}
+              >
+                {t("settings.database.uploadButton")}
+              </Button>
             </Space>
+            <div style={{ marginTop: "8px", fontSize: "12px", color: "var(--ss-text-secondary)" }}>
+              {t("settings.database.uploadHint")}
+            </div>
           </Card>
 
           <Card style={{ backgroundColor: "var(--ss-card-bg)", color: "var(--ss-text-main)" }}>
diff --git a/src/i18n/locales/en-US.json b/src/i18n/locales/en-US.json
index 34ed95c..e139f55 100644
--- a/src/i18n/locales/en-US.json
+++ b/src/i18n/locales/en-US.json
@@ -205,7 +205,15 @@
       "syncPoint3": "Application restart required after switching database.",
       "syncPoint4": "Recommended cloud database services: Neon, Supabase, AWS RDS, etc.",
       "enterConnectionString": "Please enter PostgreSQL connection string",
-      "connectionExample": "Example: postgresql://xxxxxx_xxxxx:xxxxxxxx@xx-xxx.xxx.neon.xxxx/xxxxdxx?sslmode=require"
+      "connectionExample": "Example: postgresql://xxxxxx_xxxxx:xxxxxxxx@xx-xxx.xxx.neon.xxxx/xxxxdxx?sslmode=require",
+      "uploadButton": "Upload Local Data to Remote",
+      "uploadHint": "After connecting remote database, upload and merge local SQLite history into remote.",
+      "uploadNeedRemote": "Please connect to PostgreSQL remote database first",
+      "noNeedUpload": "Local and remote data are already consistent",
+      "uploadConfirmTitle": "Upload local data to remote?",
+      "uploadConfirmContent": "Sync will prefer local data. Detected local-only {{localOnly}}, remote-only {{remoteOnly}}, conflicts {{conflicts}}.",
+      "uploadSuccess": "Local data uploaded to remote",
+      "uploadFailed": "Upload failed"
     },
     "data": {
       "title": "Data Management",
diff --git a/src/i18n/locales/zh-CN.json b/src/i18n/locales/zh-CN.json
index 6e3e139..f44f086 100644
--- a/src/i18n/locales/zh-CN.json
+++ b/src/i18n/locales/zh-CN.json
@@ -205,7 +205,15 @@
       "syncPoint3": "切换数据库后需要重启应用以生效。",
       "syncPoint4": "建议使用云数据库服务（如 Neon、Supabase、AWS RDS 等）。",
       "enterConnectionString": "请输入 PostgreSQL 连接字符串",
-      "connectionExample": "示例：postgresql://xxxxxx_xxxxx:xxxxxxxx@xx-xxx.xxx.neon.xxxx/xxxxdxx?sslmode=require"
+      "connectionExample": "示例：postgresql://xxxxxx_xxxxx:xxxxxxxx@xx-xxx.xxx.neon.xxxx/xxxxdxx?sslmode=require",
+      "uploadButton": "上传本地数据到远程",
+      "uploadHint": "连接远程数据库后，可将本地 SQLite 历史数据上传并合并到远程。",
+      "uploadNeedRemote": "请先切换并连接到 PostgreSQL 远程数据库",
+      "noNeedUpload": "本地与远程数据已一致，无需上传",
+      "uploadConfirmTitle": "确认上传本地数据到远程？",
+      "uploadConfirmContent": "将以本地数据为优先进行同步。检测到本地新增 {{localOnly}} 条、远程新增 {{remoteOnly}} 条、冲突 {{conflicts}} 条。",
+      "uploadSuccess": "本地数据已上传到远程",
+      "uploadFailed": "上传失败"
     },
     "data": {
       "title": "数据管理",