diff --git a/database.sql b/database.sql
new file mode 100644
index 0000000..e77d63c
--- /dev/null
+++ b/database.sql
@@ -0,0 +1,166 @@
+-- PicHost 完整数据库结构
+SET FOREIGN_KEY_CHECKS=0;
+DROP TABLE IF EXISTS `users`, `images`, `tags`, `image_tags`, `password_resets`, `feedbacks`, `image_feedbacks`, `user_settings`, `notification_types`, `user_notification_settings`, `notifications`, `file_operations`;
+
+-- 用户表
+CREATE TABLE `users` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `username` VARCHAR(50) UNIQUE NOT NULL,
+    `email` VARCHAR(100) UNIQUE NOT NULL,
+    `password` VARCHAR(255) NOT NULL,
+    `role` ENUM('user', 'admin') DEFAULT 'user',
+    `is_verified` BOOLEAN DEFAULT FALSE,
+    `verification_code` VARCHAR(255),
+    `api_key` VARCHAR(255),
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 图片表
+CREATE TABLE `images` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `user_id` INT NOT NULL,
+    `title` VARCHAR(255),
+    `description` TEXT,
+    `filename` VARCHAR(255) NOT NULL,
+    `is_public` BOOLEAN DEFAULT TRUE,
+    `file_size` INT,
+    `mime_type` VARCHAR(100),
+    `views` INT DEFAULT 0,
+    `uploaded_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 标签表
+CREATE TABLE `tags` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `name` VARCHAR(50) UNIQUE NOT NULL,
+    `color` VARCHAR(7) DEFAULT '#3498db',
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 图片标签关联表
+CREATE TABLE `image_tags` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `image_id` INT NOT NULL,
+    `tag_id` INT NOT NULL,
+    FOREIGN KEY (`image_id`) REFERENCES `images`(`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`tag_id`) REFERENCES `tags`(`id`) ON DELETE CASCADE,
+    UNIQUE KEY `unique_image_tag` (`image_id`, `tag_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 密码重置表
+CREATE TABLE `password_resets` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `email` VARCHAR(100) NOT NULL,
+    `token` VARCHAR(255) NOT NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `expires_at` TIMESTAMP NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 反馈表
+CREATE TABLE `feedbacks` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `user_id` INT NULL,
+    `type` ENUM('bug', 'feature', 'suggestion', 'other') NOT NULL,
+    `subject` VARCHAR(255) NOT NULL,
+    `message` TEXT NOT NULL,
+    `status` ENUM('pending', 'reviewed', 'resolved') DEFAULT 'pending',
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE SET NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 图片反馈表
+CREATE TABLE `image_feedbacks` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `image_id` INT NOT NULL,
+    `user_id` INT NULL,
+    `type` ENUM('like', 'report') NOT NULL,
+    `comment` TEXT NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`image_id`) REFERENCES `images`(`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE SET NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 用户设置表
+CREATE TABLE `user_settings` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `user_id` INT NOT NULL UNIQUE,
+    `dark_mode` BOOLEAN DEFAULT FALSE,
+    `language` VARCHAR(10) DEFAULT 'zh-CN',
+    `items_per_page` INT DEFAULT 20,
+    `email_notifications` BOOLEAN DEFAULT TRUE,
+    `browser_notifications` BOOLEAN DEFAULT TRUE,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 通知类型表
+CREATE TABLE `notification_types` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `name` VARCHAR(50) NOT NULL,
+    `description` TEXT,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 用户通知设置表
+CREATE TABLE `user_notification_settings` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `user_id` INT NOT NULL,
+    `notification_type_id` INT NOT NULL,
+    `enabled` BOOLEAN DEFAULT TRUE,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    UNIQUE KEY `unique_user_notification` (`user_id`, `notification_type_id`),
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`notification_type_id`) REFERENCES `notification_types`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 通知表
+CREATE TABLE `notifications` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `user_id` INT NOT NULL,
+    `type_id` INT NOT NULL,
+    `title` VARCHAR(255) NOT NULL,
+    `message` TEXT NOT NULL,
+    `related_url` VARCHAR(500) NULL,
+    `is_read` BOOLEAN DEFAULT FALSE,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`type_id`) REFERENCES `notification_types`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 文件操作记录表
+CREATE TABLE `file_operations` (
+    `id` INT AUTO_INCREMENT PRIMARY KEY,
+    `user_id` INT NULL,
+    `operation` ENUM('upload', 'delete', 'rename', 'move') NOT NULL,
+    `file_path` VARCHAR(500) NOT NULL,
+    `old_path` VARCHAR(500) NULL,
+    `file_size` INT NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE SET NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+-- 插入默认数据
+INSERT IGNORE INTO `tags` (`id`, `name`, `color`) VALUES 
+(1, '风景', '#27ae60'),
+(2, '人物', '#e74c3c'),
+(3, '动物', '#f39c12'),
+(4, '建筑', '#9b59b6'),
+(5, '美食', '#e67e22'),
+(6, '艺术', '#1abc9c'),
+(7, '科技', '#3498db'),
+(8, '运动', '#2ecc71');
+
+INSERT IGNORE INTO `notification_types` (`id`, `name`, `description`) VALUES 
+(1, 'announcement', '系统公告和更新通知'),
+(2, 'tips', '使用技巧和最佳实践'),
+(3, 'feedback_result', '反馈处理结果'),
+(4, 'image_feedback', '图片反馈通知');
+
+-- 创建管理员用户 (密码: admin123)
+INSERT IGNORE INTO `users` (`id`, `username`, `email`, `password`, `role`, `is_verified`) VALUES 
+(1, 'admin', 'admin@66ghz.com', '$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi', 'admin', 1);
+
+SET FOREIGN_KEY_CHECKS=1;
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