diff --git a/admin/themes.php b/admin/themes.php
index 0358e67b..2a3a6601 100644
--- a/admin/themes.php
+++ b/admin/themes.php
@@ -12,7 +12,7 @@ include 'menu.php';
                 <ul class="typecho-option-tabs fix-tabs clearfix">
                     <li class="current"><a href="<?php $options->adminUrl('themes.php'); ?>"><?php _e('可以使用的外观'); ?></a>
                     </li>
-                    <?php if (!defined('__TYPECHO_THEME_WRITEABLE__') || __TYPECHO_THEME_WRITEABLE__): ?>
+                    <?php if (\Widget\Themes\Files::isWriteable()): ?>
                         <li><a href="<?php $options->adminUrl('theme-editor.php'); ?>"><?php _e('编辑当前外观'); ?></a></li>
                     <?php endif; ?>
                     <?php if (\Widget\Themes\Config::isExists()): ?>
@@ -33,10 +33,21 @@ include 'menu.php';
                         </thead>
 
                         <tbody>
+                        <?php if ($options->missingTheme): ?>
+                            <tr id="theme-<?php $options->missingTheme; ?>" class="current">
+                                <td colspan="2" class="warning">
+                                    <p><strong><?php _e('检测到您之前使用的 "%s" 外观文件不存在，您可以重新上传此外观或者启用其他外观。', $options->missingTheme); ?></strong></p>
+                                    <ul>
+                                        <li><?php _e('重新上传此外观后刷新当前页面，此提示将会消失。'); ?></li>
+                                        <li><?php _e('启用新外观后，当前外观的设置数据将被删除。'); ?></li>
+                                    </ul>
+                                </td>
+                            </tr>
+                        <?php endif; ?>
                         <?php \Widget\Themes\Rows::alloc()->to($themes); ?>
                         <?php while ($themes->next()): ?>
                             <tr id="theme-<?php $themes->name(); ?>"
-                                class="<?php if ($themes->activated): ?>current<?php endif; ?>">
+                                class="<?php if ($themes->activated && !$options->missingTheme): ?>current<?php endif; ?>">
                                 <td valign="top"><img src="<?php $themes->screen(); ?>"
                                                       alt="<?php $themes->name(); ?>"/></td>
                                 <td valign="top">
@@ -46,9 +57,9 @@ include 'menu.php';
                                         <?php if ($themes->version): ?><?php _e('版本'); ?>: <?php $themes->version() ?><?php endif; ?>
                                     </cite>
                                     <p><?php echo nl2br($themes->description); ?></p>
-                                    <?php if ($options->theme != $themes->name): ?>
+                                    <?php if ($options->theme != $themes->name || $options->missingTheme): ?>
                                         <p>
-                                            <?php if (!defined('__TYPECHO_THEME_WRITEABLE__') || __TYPECHO_THEME_WRITEABLE__): ?>
+                                            <?php if (\Widget\Themes\Files::isWriteable()): ?>
                                                 <a class="edit"
                                                    href="<?php $options->adminUrl('theme-editor.php?theme=' . $themes->name); ?>"><?php _e('编辑'); ?></a> &nbsp;
                                             <?php endif; ?>
diff --git a/config.inc.sqlite.php b/config.inc.sqlite.php
new file mode 100644
index 00000000..23e48892
--- /dev/null
+++ b/config.inc.sqlite.php
@@ -0,0 +1,27 @@
+<?php
+// site root path
+define('__TYPECHO_ROOT_DIR__', dirname(__FILE__));
+
+// plugin directory (relative path)
+define('__TYPECHO_PLUGIN_DIR__', '/usr/plugins');
+
+// theme directory (relative path)
+define('__TYPECHO_THEME_DIR__', '/usr/themes');
+
+// admin directory (relative path)
+define('__TYPECHO_ADMIN_DIR__', '/admin/');
+
+// register autoload
+require_once __TYPECHO_ROOT_DIR__ . '/var/Typecho/Common.php';
+
+// init
+\Typecho\Common::init();
+
+// config db
+$db = new \Typecho\Db('SQLite', 'typecho_');
+$db->addServer(array (
+  'file' => '/Users/joyqi/Work/typecho/usr/62396a762847a.db',
+), \Typecho\Db::READ | \Typecho\Db::WRITE);
+\Typecho\Db::set($db);
+
+define('__TYPECHO_DEBUG__', true);
diff --git a/var/Widget/Options.php b/var/Widget/Options.php
index 0519b0e2..f520d5f4 100644
--- a/var/Widget/Options.php
+++ b/var/Widget/Options.php
@@ -46,6 +46,7 @@ if (!defined('__TYPECHO_ROOT_DIR__')) {
  * @property string $keywords
  * @property string $lang
  * @property string $theme
+ * @property string|null $missingTheme
  * @property int $pageSize
  * @property int $serverTimezone
  * @property int $timezone
@@ -186,7 +187,12 @@ class Options extends Base
         $this->plugins = unserialize($this->plugins);
 
         /** 动态判断皮肤目录 */
-        $this->theme = is_dir($this->themeFile($this->theme)) ? $this->theme : 'default';
+        $this->missingTheme = null;
+
+        if (!is_dir($this->themeFile($this->theme))) {
+            $this->missingTheme = $this->theme;
+            $this->theme = 'default';
+        }
 
         /** 增加对SSL连接的支持 */
         if ($this->request->isSecure() && 0 === strpos($this->siteUrl, 'http://')) {
diff --git a/var/Widget/Themes/Config.php b/var/Widget/Themes/Config.php
index 678a6252..02bda8f8 100644
--- a/var/Widget/Themes/Config.php
+++ b/var/Widget/Themes/Config.php
@@ -47,7 +47,7 @@ class Config extends BaseOptions
         $options = Options::alloc();
         $configFile = $options->themeFile($options->theme, 'functions.php');
 
-        if (file_exists($configFile)) {
+        if (!$options->missingTheme && file_exists($configFile)) {
             require_once $configFile;
 
             if (function_exists('themeConfig')) {
diff --git a/var/Widget/Themes/Edit.php b/var/Widget/Themes/Edit.php
index 64177a9f..5b1cb1a4 100644
--- a/var/Widget/Themes/Edit.php
+++ b/var/Widget/Themes/Edit.php
@@ -36,7 +36,8 @@ class Edit extends Options implements ActionInterface
         $theme = trim($theme, './');
         if (is_dir($this->options->themeFile($theme))) {
             /** 删除原外观设置信息 */
-            $this->delete($this->db->sql()->where('name = ?', 'theme:' . $this->options->theme));
+            $oldTheme = $this->options->missingTheme ?: $this->options->theme;
+            $this->delete($this->db->sql()->where('name = ?', 'theme:' . $oldTheme));
 
             $this->update(['value' => $theme], $this->db->sql()->where('name = ?', 'theme'));
 
@@ -130,7 +131,7 @@ class Edit extends Options implements ActionInterface
         $form = Config::alloc()->config();
 
         /** 验证表单 */
-        if ($form->validate()) {
+        if (!Config::isExists() || $form->validate()) {
             $this->response->goBack();
         }
 
diff --git a/var/Widget/Themes/Files.php b/var/Widget/Themes/Files.php
index 80a073aa..a44ba928 100644
--- a/var/Widget/Themes/Files.php
+++ b/var/Widget/Themes/Files.php
@@ -81,6 +81,17 @@ class Files extends Base
         throw new Widget\Exception('风格文件不存在', 404);
     }
 
+    /**
+     * 判断是否拥有写入权限
+     *
+     * @return bool
+     */
+    public static function isWriteable(): bool
+    {
+        return (!defined('__TYPECHO_THEME_WRITEABLE__') || __TYPECHO_THEME_WRITEABLE__)
+            && !Options::alloc()->missingTheme;
+    }
+
     /**
      * 获取菜单标题
      *
@@ -111,7 +122,7 @@ class Files extends Base
     {
         return is_writeable(Options::alloc()
                 ->themeFile($this->currentTheme, $this->currentFile))
-            && (!defined('__TYPECHO_THEME_WRITEABLE__') || __TYPECHO_THEME_WRITEABLE__);
+            && self::isWriteable();
     }
 
     /**