diff --git a/src/main/java/run/halo/app/config/HaloConfiguration.java b/src/main/java/run/halo/app/config/HaloConfiguration.java
index 0b3d8f627..25844f4d1 100644
--- a/src/main/java/run/halo/app/config/HaloConfiguration.java
+++ b/src/main/java/run/halo/app/config/HaloConfiguration.java
@@ -149,7 +149,8 @@ public class HaloConfiguration {
                 "/api/admin/login",
                 "/api/admin/refresh/*",
                 "/api/admin/installations",
-                "/api/admin/recoveries/migrations/*"
+                "/api/admin/recoveries/migrations/*",
+                "/api/admin/is_installed"
         );
         adminAuthenticationFilter.setFailureHandler(
                 failureHandler);
diff --git a/src/main/java/run/halo/app/controller/admin/api/AdminController.java b/src/main/java/run/halo/app/controller/admin/api/AdminController.java
index 0586dcfc9..57b9091d3 100644
--- a/src/main/java/run/halo/app/controller/admin/api/AdminController.java
+++ b/src/main/java/run/halo/app/controller/admin/api/AdminController.java
@@ -8,9 +8,11 @@ import run.halo.app.cache.lock.CacheLock;
 import run.halo.app.model.dto.EnvironmentDTO;
 import run.halo.app.model.dto.StatisticDTO;
 import run.halo.app.model.params.LoginParam;
+import run.halo.app.model.properties.PrimaryProperties;
 import run.halo.app.model.support.BaseResponse;
 import run.halo.app.security.token.AuthToken;
 import run.halo.app.service.AdminService;
+import run.halo.app.service.OptionService;
 
 import javax.validation.Valid;
 
@@ -28,25 +30,17 @@ public class AdminController {
 
     private final AdminService adminService;
 
-    public AdminController(AdminService adminService) {
+    private final OptionService optionService;
+
+    public AdminController(AdminService adminService, OptionService optionService) {
         this.adminService = adminService;
+        this.optionService = optionService;
     }
 
-    /**
-     * Get some statistics about the count of posts, the count of comments, etc.
-     *
-     * @return counts
-     */
-    @GetMapping("counts")
-    @ApiOperation("Gets count info")
-    public StatisticDTO getCount() {
-        return adminService.getCount();
-    }
-
-    @GetMapping("environments")
-    @ApiOperation("Gets environments info")
-    public EnvironmentDTO getEnvironments() {
-        return adminService.getEnvironments();
+    @GetMapping(value = "/is_installed")
+    @ApiOperation("Check install status")
+    public boolean isInstall() {
+        return optionService.getByPropertyOrDefault(PrimaryProperties.IS_INSTALLED, Boolean.class, false);
     }
 
     @PostMapping("login")
@@ -70,6 +64,23 @@ public class AdminController {
         return adminService.refreshToken(refreshToken);
     }
 
+    /**
+     * Get some statistics about the count of posts, the count of comments, etc.
+     *
+     * @return counts
+     */
+    @GetMapping("counts")
+    @ApiOperation("Gets count info")
+    public StatisticDTO getCount() {
+        return adminService.getCount();
+    }
+
+    @GetMapping("environments")
+    @ApiOperation("Gets environments info")
+    public EnvironmentDTO getEnvironments() {
+        return adminService.getEnvironments();
+    }
+
     @PutMapping("halo-admin")
     @ApiOperation("Updates halo-admin manually")
     public void updateAdmin() {
@@ -79,6 +90,6 @@ public class AdminController {
     @GetMapping("spring/logs")
     @ApiOperation("Get application logs")
     public BaseResponse<String> getSpringLogs() {
-        return BaseResponse.ok(HttpStatus.OK.getReasonPhrase(),adminService.getSpringLogs());
+        return BaseResponse.ok(HttpStatus.OK.getReasonPhrase(), adminService.getSpringLogs());
     }
 }
diff --git a/src/main/resources/templates/common/web/sitemap_html.ftl b/src/main/resources/templates/common/web/sitemap_html.ftl
index 2d25a4782..9e24e0f09 100644
--- a/src/main/resources/templates/common/web/sitemap_html.ftl
+++ b/src/main/resources/templates/common/web/sitemap_html.ftl
@@ -116,10 +116,6 @@ see https://gitee.com/yadong.zhang/DBlog/blob/master/blog-web/src/main/java/com/
                 overflow: hidden;
             }
         }
-
-        @media (min-width: 768px) {
-
-        }
     </style>
 </head>
 <body>
@@ -192,7 +188,7 @@ see https://gitee.com/yadong.zhang/DBlog/blob/master/blog-web/src/main/java/com/
     </ul>
 </div>
 <div id="footer">
-    该文件由<a href="${context!}" title="${options.blog_title!}">${options.blog_title!}</a>网站自动生成。
+    该文件由 <a href="${context!}" title="${options.blog_title!}">${options.blog_title!}</a> 网站自动生成。
 </div>
 </body>
 </html>