diff --git a/controller/seafile-controller.c b/controller/seafile-controller.c
index 8d15edf7..a81fce17 100644
--- a/controller/seafile-controller.c
+++ b/controller/seafile-controller.c
@@ -370,19 +370,35 @@ start_seafdav() {
     char port[16];
     snprintf (port, sizeof(port), "%d", conf.port);
 
-    char *argv[] = {
-        (char *)get_python_executable(),
-        "-m", "wsgidav.server.server_cli",
-        "--server", "gunicorn",
-        "--root", "/",
-        "--log-file", seafdav_log_file, 
-        "--pid", ctl->pidfile[PID_SEAFDAV],
-        "--port", port,
-        "--host", conf.host,
-        NULL
-    };
-
-    int pid = spawn_process (argv, true);
+    int pid;
+    if (conf.debug_mode) {
+        char *argv[] = {
+            (char *)get_python_executable(),
+            "-m", "wsgidav.server.server_cli",
+            "--server", "gunicorn",
+            "--root", "/",
+            "--log-file", seafdav_log_file, 
+            "--pid", ctl->pidfile[PID_SEAFDAV],
+            "--port", port,
+            "--host", conf.host,
+            "-v",
+            NULL
+        };
+        pid = spawn_process (argv, true);
+    } else {
+        char *argv[] = {
+            (char *)get_python_executable(),
+            "-m", "wsgidav.server.server_cli",
+            "--server", "gunicorn",
+            "--root", "/",
+            "--log-file", seafdav_log_file, 
+            "--pid", ctl->pidfile[PID_SEAFDAV],
+            "--port", port,
+            "--host", conf.host,
+            NULL
+        };
+        pid = spawn_process (argv, true);
+    }
 
     if (pid <= 0) {
         seaf_warning ("Failed to spawn seafdav\n");
@@ -779,6 +795,15 @@ read_seafdav_config()
         g_clear_error (&error);
     }
 
+    ctl->seafdav_config.debug_mode = g_key_file_get_boolean (key_file, "WEBDAV", "debug", &error);
+    if (error != NULL) {
+        if (error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
+            seaf_message ("Error when reading WEBDAV.debug, use deafult value FALSE\n");
+        }
+        ctl->seafdav_config.debug_mode = FALSE;
+        g_clear_error (&error);
+    }
+
     if (ctl->seafdav_config.port <= 0 || ctl->seafdav_config.port > 65535) {
         seaf_warning("Failed to load seafdav config: invalid port %d\n", ctl->seafdav_config.port);
         ret = -1;
diff --git a/controller/seafile-controller.h b/controller/seafile-controller.h
index bf9e4c07..53f4061a 100644
--- a/controller/seafile-controller.h
+++ b/controller/seafile-controller.h
@@ -35,6 +35,7 @@ typedef struct SeafDavConfig {
     gboolean enabled;
     int port;
     char *host;
+    gboolean debug_mode;
 
 } SeafDavConfig;