diff --git a/package-lock.json b/package-lock.json
index f48523d..1a00fc1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
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+          "url": "https://feross.org/support"
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@@ -1102,6 +1270,42 @@
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+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://github.com/sponsors/RubenVerborgh"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=4.0"
+      },
+      "peerDependenciesMeta": {
+        "debug": {
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+      "license": "MIT",
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+        "combined-stream": "^1.0.8",
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@@ -1117,6 +1321,15 @@
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+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
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+      "funding": {
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@@ -1129,6 +1342,43 @@
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@@ -1142,6 +1392,70 @@
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+      "license": "MIT",
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+      "license": "MIT",
+      "engines": {
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+        "url": "https://github.com/sponsors/ljharb"
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+    "node_modules/proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==",
+      "license": "MIT"
+    },
     "node_modules/resolve-pkg-maps": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/resolve-pkg-maps/-/resolve-pkg-maps-1.0.0.tgz",
diff --git a/package.json b/package.json
index 9379985..eab2c17 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
   "dependencies": {
     "@ai-sdk/anthropic": "^2.0.54",
     "@ai-sdk/deepseek": "^1.0.31",
+    "@tavily/core": "^0.6.0",
     "ai": "^5.0.108",
     "chalk": "^5.3.0",
     "commander": "^12.1.0",
diff --git a/src/permission/checkers/index.ts b/src/permission/checkers/index.ts
index 8a655ab..7c84cf5 100644
--- a/src/permission/checkers/index.ts
+++ b/src/permission/checkers/index.ts
@@ -1,3 +1,4 @@
 export type { PermissionChecker, BasePermissionConfig } from './base.js';
 export { BashPermissionChecker } from './bash.js';
 export { FilePermissionChecker } from './file.js';
+export { WebPermissionChecker } from './web.js';
diff --git a/src/permission/checkers/web.ts b/src/permission/checkers/web.ts
new file mode 100644
index 0000000..307f3d2
--- /dev/null
+++ b/src/permission/checkers/web.ts
@@ -0,0 +1,159 @@
+import type {
+  WebPermissionConfig,
+  WebPermissionContext,
+  PermissionCheckResult,
+  PermissionDecision,
+  PermissionContext,
+} from '../types.js';
+import type { PermissionChecker } from './base.js';
+
+// 默认 Web 权限配置
+const DEFAULT_CONFIG: WebPermissionConfig = {
+  default: 'ask',  // 默认需要确认
+  allowAdvancedSearch: true,
+  allowedTopics: [],  // 空数组表示允许所有主题
+};
+
+/**
+ * Web 搜索权限检查器
+ * 控制网络搜索操作的权限
+ */
+export class WebPermissionChecker implements PermissionChecker {
+  readonly name = 'web';
+
+  private config: WebPermissionConfig;
+  private askCallback?: (ctx: PermissionContext) => Promise<PermissionDecision>;
+  private sessionPermissions = new Map<string, 'allow' | 'deny'>();
+
+  constructor() {
+    this.config = { ...DEFAULT_CONFIG };
+  }
+
+  /**
+   * 设置权限询问回调
+   */
+  setAskCallback(callback: (ctx: PermissionContext) => Promise<PermissionDecision>): void {
+    this.askCallback = callback;
+  }
+
+  /**
+   * 检查 Web 搜索权限
+   */
+  async checkWebPermission(ctx: WebPermissionContext): Promise<PermissionCheckResult> {
+    const { query, searchDepth, topic } = ctx;
+
+    // 1. 检查深度搜索权限
+    if (searchDepth === 'advanced' && !this.config.allowAdvancedSearch) {
+      return {
+        allowed: false,
+        action: 'deny',
+        reason: '不允许深度搜索',
+      };
+    }
+
+    // 2. 检查主题限制
+    if (this.config.allowedTopics.length > 0 && topic) {
+      if (!this.config.allowedTopics.includes(topic)) {
+        return {
+          allowed: false,
+          action: 'deny',
+          reason: `不允许搜索主题: ${topic}`,
+        };
+      }
+    }
+
+    // 3. 检查会话级别的临时权限
+    const sessionKey = `web_search`;
+    const sessionPerm = this.sessionPermissions.get(sessionKey);
+    if (sessionPerm === 'allow') {
+      return {
+        allowed: true,
+        action: 'allow',
+        reason: '本次会话已允许网络搜索',
+      };
+    }
+    if (sessionPerm === 'deny') {
+      return {
+        allowed: false,
+        action: 'deny',
+        reason: '本次会话已拒绝网络搜索',
+      };
+    }
+
+    // 4. 根据默认策略处理
+    const action = this.config.default;
+
+    if (action === 'allow') {
+      return {
+        allowed: true,
+        action: 'allow',
+        reason: '默认允许网络搜索',
+      };
+    }
+
+    if (action === 'deny') {
+      return {
+        allowed: false,
+        action: 'deny',
+        reason: '默认拒绝网络搜索',
+      };
+    }
+
+    // action === 'ask'
+    if (!this.askCallback) {
+      return {
+        allowed: false,
+        action: 'ask',
+        needsConfirmation: true,
+        reason: `搜索: ${query}`,
+      };
+    }
+
+    // 调用回调询问用户
+    const decision = await this.askCallback({
+      command: `web_search: ${query}`,
+      workdir: process.cwd(),
+    });
+
+    if (decision.remember) {
+      this.sessionPermissions.set(sessionKey, decision.allow ? 'allow' : 'deny');
+    }
+
+    return {
+      allowed: decision.allow,
+      action: decision.allow ? 'allow' : 'deny',
+      reason: decision.allow ? '用户允许' : '用户拒绝',
+    };
+  }
+
+  /**
+   * 实现 PermissionChecker 接口的 check 方法
+   * 从通用 PermissionContext 中提取 Web 搜索信息
+   */
+  async check(ctx: PermissionContext): Promise<PermissionCheckResult> {
+    // 从 command 中提取搜索查询
+    const query = ctx.command.replace(/^web_search:\s*/, '');
+    return this.checkWebPermission({ query });
+  }
+
+  /**
+   * 清除会话权限
+   */
+  clearSessionPermissions(): void {
+    this.sessionPermissions.clear();
+  }
+
+  /**
+   * 获取当前配置
+   */
+  getConfig(): WebPermissionConfig {
+    return { ...this.config };
+  }
+
+  /**
+   * 更新配置
+   */
+  setConfig(config: Partial<WebPermissionConfig>): void {
+    this.config = { ...this.config, ...config };
+  }
+}
diff --git a/src/permission/manager.ts b/src/permission/manager.ts
index f2db086..2acab17 100644
--- a/src/permission/manager.ts
+++ b/src/permission/manager.ts
@@ -3,10 +3,12 @@ import type {
   PermissionCheckResult,
   PermissionDecision,
   FilePermissionContext,
+  WebPermissionContext,
 } from './types.js';
 import type { PermissionChecker } from './checkers/base.js';
 import { BashPermissionChecker } from './checkers/bash.js';
 import { FilePermissionChecker } from './checkers/file.js';
+import { WebPermissionChecker } from './checkers/web.js';
 
 /**
  * 权限管理器
@@ -20,6 +22,7 @@ export class PermissionManager {
     // 注册默认的检查器
     this.registerChecker(new BashPermissionChecker(projectRoot));
     this.registerChecker(new FilePermissionChecker(projectRoot));
+    this.registerChecker(new WebPermissionChecker());
   }
 
   /**
@@ -100,6 +103,22 @@ export class PermissionManager {
     return fileChecker.checkFilePermission(ctx);
   }
 
+  /**
+   * 检查 Web 搜索权限（便捷方法）
+   */
+  async checkWebPermission(ctx: WebPermissionContext): Promise<PermissionCheckResult> {
+    const webChecker = this.getChecker<WebPermissionChecker>('web');
+    if (!webChecker) {
+      return {
+        allowed: false,
+        action: 'ask',
+        needsConfirmation: true,
+        reason: 'Web 权限检查器未注册',
+      };
+    }
+    return webChecker.checkWebPermission(ctx);
+  }
+
   /**
    * 清除所有检查器的会话权限
    */
diff --git a/src/permission/types.ts b/src/permission/types.ts
index 52704b0..3773aa7 100644
--- a/src/permission/types.ts
+++ b/src/permission/types.ts
@@ -88,3 +88,21 @@ export interface PermissionDecision {
   allow: boolean;
   remember?: boolean;  // 是否记住这个决定
 }
+
+// Web 搜索权限请求上下文
+export interface WebPermissionContext {
+  query: string;           // 搜索查询
+  searchDepth?: 'basic' | 'advanced';  // 搜索深度
+  topic?: 'general' | 'news' | 'finance';  // 搜索主题
+  maxResults?: number;     // 最大结果数
+}
+
+// Web 权限配置
+export interface WebPermissionConfig {
+  // 默认策略
+  default: PermissionAction;
+  // 是否允许深度搜索
+  allowAdvancedSearch: boolean;
+  // 搜索主题限制（空数组表示允许所有）
+  allowedTopics: ('general' | 'news' | 'finance')[];
+}
diff --git a/src/tools/descriptions/web_search.txt b/src/tools/descriptions/web_search.txt
new file mode 100644
index 0000000..f47ba8c
--- /dev/null
+++ b/src/tools/descriptions/web_search.txt
@@ -0,0 +1,21 @@
+搜索网络获取最新信息。使用 Tavily API 进行智能搜索，返回相关网页内容和 AI 摘要。
+
+这是进行网络搜索的首选工具，不要使用 curl 或 bash 命令来搜索网络。
+
+适用场景：
+- 查询最新新闻、事件、游戏更新
+- 搜索技术文档、API 参考
+- 获取实时数据（股价、天气等）
+- 查找开源项目、库的信息
+- 了解最新的技术趋势
+
+参数说明：
+- query: 搜索关键词（必填）
+- max_results: 返回结果数量，1-20，默认 5
+- search_depth: "basic" 快速搜索 / "advanced" 深度搜索
+- topic: "general" 通用 / "news" 新闻 / "finance" 财经
+- include_answer: 是否包含 AI 摘要，默认 true
+
+返回内容：
+- AI 生成的摘要答案
+- 相关网页列表（标题、链接、内容摘要）
diff --git a/src/tools/index.ts b/src/tools/index.ts
index 85aad83..0ee4e29 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -23,6 +23,9 @@ import {
   deleteFileTool,
 } from './filesystem/index.js';
 
+// Web 工具
+import { webSearchTool } from './web/index.js';
+
 // 所有工具列表（用于注册）
 const allToolsWithMetadata: ToolWithMetadata[] = [
   // 核心工具 (deferLoading: false)
@@ -43,6 +46,9 @@ const allToolsWithMetadata: ToolWithMetadata[] = [
   moveFileTool,
   copyFileTool,
   deleteFileTool,
+
+  // Web 工具 (deferLoading: true)
+  webSearchTool,
 ];
 
 // 注册所有工具到 registry
diff --git a/src/tools/tool-search.ts b/src/tools/tool-search.ts
index 202f75c..53b16b1 100644
--- a/src/tools/tool-search.ts
+++ b/src/tools/tool-search.ts
@@ -62,7 +62,7 @@ export const toolSearchTool: ToolWithMetadata = {
 
     return {
       success: true,
-      output: `找到 ${results.length} 个相关工具:\n\n${toolList}\n\n这些工具现在可以使用了。请选择合适的工具来完成任务。`,
+      output: `找到 ${results.length} 个相关工具:\n\n${toolList}\n\n重要：这些工具现在已经可以直接调用了。请立即使用合适的工具（如 web_search）来完成任务，不要使用 bash 命令代替。`,
     };
   },
 };
diff --git a/src/tools/web/index.ts b/src/tools/web/index.ts
new file mode 100644
index 0000000..70771e6
--- /dev/null
+++ b/src/tools/web/index.ts
@@ -0,0 +1 @@
+export { webSearchTool } from './web_search.js';
diff --git a/src/tools/web/web_search.ts b/src/tools/web/web_search.ts
new file mode 100644
index 0000000..05e51fc
--- /dev/null
+++ b/src/tools/web/web_search.ts
@@ -0,0 +1,138 @@
+import { tavily } from '@tavily/core';
+import type { ToolResult } from '../../types/index.js';
+import type { ToolWithMetadata } from '../types.js';
+import { loadDescription } from '../load_description.js';
+import { getConfig } from '../../utils/config.js';
+import { getPermissionManager } from '../../permission/index.js';
+
+export const webSearchTool: ToolWithMetadata = {
+  name: 'web_search',
+  description: loadDescription('web_search'),
+  metadata: {
+    name: 'web_search',
+    category: 'web',
+    description: '搜索网络获取最新信息',
+    keywords: ['search', 'web', 'internet', 'google', 'query', '搜索', '网络', '查询', '互联网'],
+    deferLoading: false, // 核心工具，始终可用
+  },
+  parameters: {
+    query: {
+      type: 'string',
+      description: '搜索查询关键词',
+      required: true,
+    },
+    max_results: {
+      type: 'number',
+      description: '返回结果数量（默认 5，最大 20）',
+      required: false,
+    },
+    search_depth: {
+      type: 'string',
+      description: '搜索深度: "basic" 快速搜索，"advanced" 深度搜索（默认 basic）',
+      required: false,
+    },
+    topic: {
+      type: 'string',
+      description: '搜索主题: "general" 通用，"news" 新闻，"finance" 财经（默认 general）',
+      required: false,
+    },
+    include_answer: {
+      type: 'boolean',
+      description: '是否包含 AI 生成的摘要答案（默认 true）',
+      required: false,
+    },
+  },
+  execute: async (params: Record<string, unknown>): Promise<ToolResult> => {
+    const query = params.query as string;
+    const maxResults = Math.min((params.max_results as number) || 5, 20);
+    const searchDepth = (params.search_depth as 'basic' | 'advanced') || 'basic';
+    const topic = (params.topic as 'general' | 'news' | 'finance') || 'general';
+    const includeAnswer = params.include_answer !== false;
+
+    // 权限检查
+    const permissionManager = getPermissionManager();
+    const permResult = await permissionManager.checkWebPermission({
+      query,
+      searchDepth,
+      topic,
+      maxResults,
+    });
+
+    if (!permResult.allowed) {
+      // 如果需要用户确认但没有设置回调，返回等待确认的状态
+      if (permResult.needsConfirmation) {
+        return {
+          success: false,
+          output: '',
+          error: `需要用户确认网络搜索: "${query}"\n原因: ${permResult.reason || '需要权限确认'}`,
+        };
+      }
+
+      return {
+        success: false,
+        output: '',
+        error: `网络搜索权限被拒绝: ${permResult.reason || '搜索不被允许'}`,
+      };
+    }
+
+    // 获取 Tavily API Key
+    const config = getConfig();
+    const apiKey = process.env.TAVILY_API_KEY || config.tavilyApiKey;
+
+    if (!apiKey) {
+      return {
+        success: false,
+        output: '',
+        error: '未配置 Tavily API Key。请设置环境变量 TAVILY_API_KEY 或在配置文件中添加 tavilyApiKey。',
+      };
+    }
+
+    try {
+      // 使用 Tavily SDK
+      const client = tavily({ apiKey });
+      const response = await client.search(query, {
+        searchDepth,
+        topic,
+        maxResults,
+        includeAnswer,
+      });
+
+      // 格式化输出
+      let output = `## 搜索结果: "${query}"\n\n`;
+
+      // 如果有 AI 摘要答案
+      if (response.answer) {
+        output += `### 摘要\n${response.answer}\n\n`;
+      }
+
+      // 搜索结果列表
+      if (response.results && response.results.length > 0) {
+        output += `### 相关链接 (${response.results.length} 条)\n\n`;
+
+        for (let i = 0; i < response.results.length; i++) {
+          const result = response.results[i];
+          output += `**${i + 1}. ${result.title}**\n`;
+          output += `链接: ${result.url}\n`;
+          // 截断过长的内容
+          const content = result.content.length > 300
+            ? result.content.substring(0, 300) + '...'
+            : result.content;
+          output += `${content}\n\n`;
+        }
+      } else {
+        output += '未找到相关结果。\n';
+      }
+
+      return {
+        success: true,
+        output,
+      };
+    } catch (error) {
+      return {
+        success: false,
+        output: '',
+        error: `搜索失败: ${error instanceof Error ? error.message : String(error)}`,
+      };
+    }
+  },
+};
diff --git a/src/utils/config.ts b/src/utils/config.ts
index ea129ab..73f83a5 100644
--- a/src/utils/config.ts
+++ b/src/utils/config.ts
@@ -12,6 +12,7 @@ interface StoredConfig {
   deepseekApiKey?: string;
   model?: string;
   maxTokens?: number;
+  tavilyApiKey?: string;
 }
 
 // 默认模型配置
@@ -40,6 +41,19 @@ const DEFAULT_SYSTEM_PROMPT = `你是一个运行在终端中的 AI 编程助手
 当前工作目录: ${process.cwd()}
 操作系统: ${process.platform}`;
 
+// 获取原始配置（包含所有字段）
+export function getConfig(): StoredConfig {
+  if (fs.existsSync(CONFIG_FILE)) {
+    try {
+      const content = fs.readFileSync(CONFIG_FILE, 'utf-8');
+      return JSON.parse(content);
+    } catch {
+      return {};
+    }
+  }
+  return {};
+}
+
 // 加载配置
 export function loadConfig(): AgentConfig {
   // 从环境变量获取