diff --git a/app/electron/main.js b/app/electron/main.js
index 737815f5e..fdc770746 100644
--- a/app/electron/main.js
+++ b/app/electron/main.js
@@ -789,6 +789,13 @@ app.whenReady().then(() => {
                 break;
             case "setProxy":
                 event.sender.session.closeAllConnections().then(() => {
+                    if (data.proxyURL.startsWith("://")) {
+                        event.sender.session.setProxy({mode: "system"}).then(() => {
+                            console.log("network proxy [system]");
+                        });
+                        return;
+                    }
+
                     event.sender.session.setProxy({proxyRules: data.proxyURL}).then(() => {
                         console.log("network proxy [" + data.proxyURL + "]");
                     });
diff --git a/app/src/config/account.ts b/app/src/config/account.ts
index 0af15aa31..91f2754da 100644
--- a/app/src/config/account.ts
+++ b/app/src/config/account.ts
@@ -328,7 +328,7 @@ ${renewHTML}
         let token: string;
         let needCaptcha: string;
         captchaImgElement.addEventListener("click", () => {
-            captchaImgElement.setAttribute("src", `https://ld246.com/captcha/login?needCaptcha=${needCaptcha}&t=${new Date().getTime()}`);
+            captchaImgElement.setAttribute("src", getCloudURL("captcha") + `/login?needCaptcha=${needCaptcha}&t=${new Date().getTime()}`);
         });
 
         const cloudRegionElement = element.querySelector("#cloudRegion") as HTMLSelectElement;
@@ -354,7 +354,7 @@ ${renewHTML}
                         needCaptcha = data.data.needCaptcha;
                         captchaElement.parentElement.classList.remove("fn__none");
                         captchaElement.previousElementSibling.setAttribute("src",
-                            `https://ld246.com/captcha/login?needCaptcha=${data.data.needCaptcha}`);
+                            getCloudURL("captcha") + `/login?needCaptcha=${data.data.needCaptcha}`);
                         captchaElement.value = "";
                         return;
                     }
diff --git a/app/src/config/util/about.ts b/app/src/config/util/about.ts
index f07ed67ea..65e7784f9 100644
--- a/app/src/config/util/about.ts
+++ b/app/src/config/util/about.ts
@@ -8,10 +8,6 @@ import {Constants} from "../../constants";
 
 export const setProxy = () => {
     /// #if !BROWSER
-    if ("" === window.siyuan.config.system.networkProxy.scheme) {
-        console.log("network proxy [system]");
-        return;
-    }
     ipcRenderer.send(Constants.SIYUAN_CMD, {
         cmd: "setProxy",
         proxyURL: `${window.siyuan.config.system.networkProxy.scheme}://${window.siyuan.config.system.networkProxy.host}:${window.siyuan.config.system.networkProxy.port}`
diff --git a/app/src/mobile/settings/account.ts b/app/src/mobile/settings/account.ts
index ba08f7323..e3387a2e9 100644
--- a/app/src/mobile/settings/account.ts
+++ b/app/src/mobile/settings/account.ts
@@ -200,7 +200,7 @@ const bindLoginEvent = (modelMainElement: HTMLElement, deactive = false) => {
         });
     }
     captchaImgElement.addEventListener("click", () => {
-        captchaImgElement.setAttribute("src", `https://ld246.com/captcha/login?needCaptcha=${needCaptcha}&t=${new Date().getTime()}`);
+        captchaImgElement.setAttribute("src", getCloudURL("captcha") + `/login?needCaptcha=${needCaptcha}&t=${new Date().getTime()}`);
     });
 
     const cloudRegionElement = modelMainElement.querySelector("#cloudRegion") as HTMLSelectElement;
@@ -226,7 +226,7 @@ const bindLoginEvent = (modelMainElement: HTMLElement, deactive = false) => {
                     needCaptcha = data.data.needCaptcha;
                     captchaElement.parentElement.classList.remove("fn__none");
                     captchaElement.previousElementSibling.setAttribute("src",
-                        `https://ld246.com/captcha/login?needCaptcha=${data.data.needCaptcha}`);
+                        getCloudURL("captcha") + `/login?needCaptcha=${data.data.needCaptcha}`);
                     captchaElement.value = "";
                     return;
                 }