diff --git a/backend/.gitattributes b/backend/.gitattributes
new file mode 100644
index 0000000..dfdb8b7
--- /dev/null
+++ b/backend/.gitattributes
@@ -0,0 +1 @@
+*.sh text eol=lf
diff --git a/backend/controllers/tagController.js b/backend/controllers/tagController.js
new file mode 100644
index 0000000..e8566bd
--- /dev/null
+++ b/backend/controllers/tagController.js
@@ -0,0 +1,33 @@
+const Tag = require('../models/tags');
+
+exports.getAllTags = async (req, res) => {
+  try {
+    const tags = await Tag.findAll();
+    res.json(tags);
+  } catch (err) {
+    console.error('Error fetching tags:', err);
+    res.status(500).json({ error: 'Failed to fetch tags' });
+  }
+};
+
+exports.createTag = async (req, res) => {
+  const { name } = req.body;
+
+  // Basic validation
+  if (!name) {
+    return res.status(400).json({ error: 'Tag name is required' });
+  }
+
+  try {
+    const existing = await Tag.findByName(name);
+    if (existing) {
+      return res.status(409).json({ error: 'Tag already exists' });
+    }
+
+    const tag = await Tag.create(name);
+    res.status(201).json(tag);
+  } catch (err) {
+    console.error('Error creating tag:', err);
+    res.status(500).json({ error: 'Failed to create tag' });
+  }
+};
diff --git a/backend/db/folders.sql b/backend/db/folders.sql
new file mode 100644
index 0000000..bf0555d
--- /dev/null
+++ b/backend/db/folders.sql
@@ -0,0 +1,12 @@
+-- 開啟 UUID extension（若尚未啟用）
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+-- Create folders table
+CREATE TABLE IF NOT EXISTS folders (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    title VARCHAR(255) NOT NULL,
+    tag_id UUID NOT NULL,
+    user_id UUID NOT NULL REFERENCES users(id),
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);
diff --git a/backend/db/questions.sql b/backend/db/questions.sql
index 5c7b055..4e1c81a 100644
--- a/backend/db/questions.sql
+++ b/backend/db/questions.sql
@@ -1,12 +1,4 @@
--- Create folders table
-CREATE TABLE IF NOT EXISTS folders (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    title VARCHAR(255) NOT NULL,
-    tag_id UUID NOT NULL,
-    user_id UUID NOT NULL REFERENCES users(id),
-    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
-    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
-);
+
 
 -- Create questions table
 CREATE TABLE IF NOT EXISTS questions (
@@ -22,11 +14,3 @@ CREATE TABLE IF NOT EXISTS questions (
     updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
 );
 
--- Create tags table
-CREATE TABLE IF NOT EXISTS tags (
-    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    name VARCHAR(255) NOT NULL,
-    user_id UUID NOT NULL REFERENCES users(id),
-    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
-    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
-); 
\ No newline at end of file
diff --git a/backend/db/tags.sql b/backend/db/tags.sql
new file mode 100644
index 0000000..d63fb83
--- /dev/null
+++ b/backend/db/tags.sql
@@ -0,0 +1,11 @@
+-- 開啟 UUID extension（若尚未啟用）
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+-- Create tags table
+CREATE TABLE IF NOT EXISTS tags (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(255) NOT NULL,
+    user_id UUID NOT NULL REFERENCES users(id),
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+); 
diff --git a/backend/db/tokens.sql b/backend/db/tokens.sql
new file mode 100644
index 0000000..65fccb1
--- /dev/null
+++ b/backend/db/tokens.sql
@@ -0,0 +1,14 @@
+-- 開啟 UUID extension（若尚未啟用）
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+-- 建立 tokens 表格
+CREATE TABLE IF NOT EXISTS tokens (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id UUID NOT NULL,
+  value TEXT NOT NULL UNIQUE,
+  expired_at TIMESTAMP NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+
+  -- 外鍵關聯
+  CONSTRAINT fk_token_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
diff --git a/backend/index.js b/backend/index.js
index a4b03e9..a207c02 100644
--- a/backend/index.js
+++ b/backend/index.js
@@ -66,6 +66,9 @@ app.use((err, req, res, next) => {
   });
 });
 
+const tagRoutes = require('./routes/tagRoutes');
+app.use('/tags', tagRoutes);
+
 const PORT = process.env.PORT || 3000;
 
 app.listen(PORT, '0.0.0.0', (err) => {
@@ -82,4 +85,6 @@ app.listen(PORT, '0.0.0.0', (err) => {
   console.log('- GET /auth/me');
   console.log('- GET /api/test');
   console.log('- POST /api/question-set');
+  // console.log('- POST /tags');
+  console.log('- GET /tags');
 });
diff --git a/backend/models/folders.js b/backend/models/folders.js
new file mode 100644
index 0000000..e69de29
diff --git a/backend/models/questions.js b/backend/models/questions.js
index 9f0c758..70c0f21 100644
--- a/backend/models/questions.js
+++ b/backend/models/questions.js
@@ -11,6 +11,15 @@ class QuestionSet {
     return result.rows[0];
   }
 
+  static async findTagByName(name, userId) {
+    const query = `
+      SELECT * FROM tags
+      WHERE name = $1 AND user_id = $2
+    `;
+    const result = await db.query(query, [name, userId]);
+    return result.rows[0] || null;
+  }
+
   static async createTag(name, userId) {
     const query = `
       INSERT INTO tags (name, user_id)
@@ -43,8 +52,12 @@ class QuestionSet {
     try {
       await client.query('BEGIN');
 
-      // Create tag
-      const tag = await this.createTag(tagName, userId);
+      // Check if tag already exists
+      const tag = await this.findTagByName(tagName, userId);
+      if (!tag) {
+        // Create tag if not exists
+        tag = await this.createTag(tagName, userId);
+      }
 
       // Create folder
       const folder = await this.createFolder(folderName, tag.id, userId);
diff --git a/backend/models/tags.js b/backend/models/tags.js
new file mode 100644
index 0000000..d9d85b6
--- /dev/null
+++ b/backend/models/tags.js
@@ -0,0 +1,23 @@
+const pool = require('../db/db');
+
+const Tag = {
+  async create(name) {
+    const result = await pool.query(
+      'INSERT INTO tags (name) VALUES ($1) RETURNING *',
+      [name]
+    );
+    return result.rows[0];
+  },
+
+  async findAll() {
+    const result = await pool.query('SELECT * FROM tags ORDER BY created_at DESC');
+    return result.rows;
+  },
+
+  async findByName(name) {
+    const result = await pool.query('SELECT * FROM tags WHERE name = $1', [name]);
+    return result.rows[0];
+  }
+};
+
+module.exports = Tag;
diff --git a/backend/package-lock.json b/backend/package-lock.json
index e719a02..da46b07 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -10,10 +10,14 @@
       "license": "ISC",
       "dependencies": {
         "bcrypt": "^5.1.1",
+        "cors": "^2.8.5",
         "dotenv": "^16.5.0",
         "express": "^5.1.0",
         "jsonwebtoken": "^9.0.2",
         "pg": "^8.15.6"
+      },
+      "devDependencies": {
+        "nodemon": "^3.0.1"
       }
     },
     "node_modules/@mapbox/node-pre-gyp": {
@@ -76,6 +80,19 @@
         "node": ">=8"
       }
     },
+    "node_modules/anymatch": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz",
+      "integrity": "sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==",
+      "dev": true,
+      "dependencies": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
     "node_modules/aproba": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/aproba/-/aproba-2.0.0.tgz",
@@ -116,6 +133,18 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/binary-extensions": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.3.0.tgz",
+      "integrity": "sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/body-parser": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.0.tgz",
@@ -146,6 +175,18 @@
         "concat-map": "0.0.1"
       }
     },
+    "node_modules/braces": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
+      "integrity": "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==",
+      "dev": true,
+      "dependencies": {
+        "fill-range": "^7.1.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/buffer-equal-constant-time": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
@@ -190,6 +231,30 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/chokidar": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz",
+      "integrity": "sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==",
+      "dev": true,
+      "dependencies": {
+        "anymatch": "~3.1.2",
+        "braces": "~3.0.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      },
+      "engines": {
+        "node": ">= 8.10.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
+      }
+    },
     "node_modules/chownr": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/chownr/-/chownr-2.0.0.tgz",
@@ -259,6 +324,18 @@
         "node": ">=6.6.0"
       }
     },
+    "node_modules/cors": {
+      "version": "2.8.5",
+      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
+      "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
+      "dependencies": {
+        "object-assign": "^4",
+        "vary": "^1"
+      },
+      "engines": {
+        "node": ">= 0.10"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.0.tgz",
@@ -443,6 +520,18 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/fill-range": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz",
+      "integrity": "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg==",
+      "dev": true,
+      "dependencies": {
+        "to-regex-range": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/finalhandler": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-2.1.0.tgz",
@@ -508,6 +597,20 @@
       "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw==",
       "license": "ISC"
     },
+    "node_modules/fsevents": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
+      "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+      "dev": true,
+      "hasInstallScript": true,
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/function-bind": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
@@ -596,6 +699,18 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/glob-parent": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
+      "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
+      "dev": true,
+      "dependencies": {
+        "is-glob": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/gopd": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
@@ -608,6 +723,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -679,6 +803,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/ignore-by-default": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/ignore-by-default/-/ignore-by-default-1.0.1.tgz",
+      "integrity": "sha512-Ius2VYcGNk7T90CppJqcIkS5ooHUZyIQK+ClZfMfMNFEF9VSE73Fq+906u/CWu92x4gzZMWOwfFYckPObzdEbA==",
+      "dev": true
+    },
     "node_modules/inflight": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -705,6 +835,27 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/is-binary-path": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
+      "integrity": "sha512-ZMERYes6pDydyuGidse7OsHxtbI7WVeUEozgR/g7rd0xUimYNlvZRE/K2MgZTjWy725IfelLeVcEM97mmtRGXw==",
+      "dev": true,
+      "dependencies": {
+        "binary-extensions": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/is-extglob": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-2.1.1.tgz",
+      "integrity": "sha512-SbKbANkN603Vi4jEZv49LeVJMn4yGwsbzZworEoyEiutsN3nJYdbO36zfhGJ6QEDpOZIFkDtnq5JRxmvl3jsoQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/is-fullwidth-code-point": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
@@ -714,6 +865,27 @@
         "node": ">=8"
       }
     },
+    "node_modules/is-glob": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
+      "integrity": "sha512-xelSayHH36ZgE7ZWhli7pW34hNbNl8Ojv5KVmkJD4hBdD3th8Tfk9vYasLM+mXWOZhFkgZfxhLSnrwRr4elSSg==",
+      "dev": true,
+      "dependencies": {
+        "is-extglob": "^2.1.1"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/is-number": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
+      "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.12.0"
+      }
+    },
     "node_modules/is-promise": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/is-promise/-/is-promise-4.0.0.tgz",
@@ -979,6 +1151,34 @@
         }
       }
     },
+    "node_modules/nodemon": {
+      "version": "3.1.10",
+      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.10.tgz",
+      "integrity": "sha512-WDjw3pJ0/0jMFmyNDp3gvY2YizjLmmOUQo6DEBY+JgdvW/yQ9mEeSw6H5ythl5Ny2ytb7f9C2nIbjSxMNzbJXw==",
+      "dev": true,
+      "dependencies": {
+        "chokidar": "^3.5.2",
+        "debug": "^4",
+        "ignore-by-default": "^1.0.1",
+        "minimatch": "^3.1.2",
+        "pstree.remy": "^1.1.8",
+        "semver": "^7.5.3",
+        "simple-update-notifier": "^2.0.0",
+        "supports-color": "^5.5.0",
+        "touch": "^3.1.0",
+        "undefsafe": "^2.0.5"
+      },
+      "bin": {
+        "nodemon": "bin/nodemon.js"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/nodemon"
+      }
+    },
     "node_modules/nopt": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-5.0.0.tgz",
@@ -994,6 +1194,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/normalize-path": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
+      "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/npmlog": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-5.0.1.tgz",
@@ -1165,6 +1374,18 @@
         "split2": "^4.1.0"
       }
     },
+    "node_modules/picomatch": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/postgres-array": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/postgres-array/-/postgres-array-2.0.0.tgz",
@@ -1217,6 +1438,12 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/pstree.remy": {
+      "version": "1.1.8",
+      "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",
+      "integrity": "sha512-77DZwxQmxKnu3aR542U+X8FypNzbfJ+C5XQDk3uWjWxn6151aIMGthWYRXTqT1E5oJvg+ljaa2OJi+VfvCOQ8w==",
+      "dev": true
+    },
     "node_modules/qs": {
       "version": "6.14.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.0.tgz",
@@ -1270,6 +1497,18 @@
         "node": ">= 6"
       }
     },
+    "node_modules/readdirp": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
+      "dev": true,
+      "dependencies": {
+        "picomatch": "^2.2.1"
+      },
+      "engines": {
+        "node": ">=8.10.0"
+      }
+    },
     "node_modules/rimraf": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
@@ -1467,6 +1706,18 @@
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
       "license": "ISC"
     },
+    "node_modules/simple-update-notifier": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/simple-update-notifier/-/simple-update-notifier-2.0.0.tgz",
+      "integrity": "sha512-a2B9Y0KlNXl9u/vsW6sTIu9vGEpfKu2wRV6l1H3XEas/0gUIzGzBoP/IouTcUQbm9JWZLH3COxyn03TYlFax6w==",
+      "dev": true,
+      "dependencies": {
+        "semver": "^7.5.3"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/split2": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/split2/-/split2-4.2.0.tgz",
@@ -1520,6 +1771,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "dependencies": {
+        "has-flag": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/tar": {
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/tar/-/tar-6.2.1.tgz",
@@ -1537,6 +1800,18 @@
         "node": ">=10"
       }
     },
+    "node_modules/to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "dependencies": {
+        "is-number": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=8.0"
+      }
+    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -1546,6 +1821,15 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/touch": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/touch/-/touch-3.1.1.tgz",
+      "integrity": "sha512-r0eojU4bI8MnHr8c5bNo7lJDdI2qXlWWJk6a9EAFG7vbhTjElYhBVS3/miuE0uOuoLdb8Mc/rVfsmm6eo5o9GA==",
+      "dev": true,
+      "bin": {
+        "nodetouch": "bin/nodetouch.js"
+      }
+    },
     "node_modules/tr46": {
       "version": "0.0.3",
       "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
@@ -1566,6 +1850,12 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/undefsafe": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.5.tgz",
+      "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==",
+      "dev": true
+    },
     "node_modules/unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
diff --git a/backend/routes/tagRoutes.js b/backend/routes/tagRoutes.js
new file mode 100644
index 0000000..366259d
--- /dev/null
+++ b/backend/routes/tagRoutes.js
@@ -0,0 +1,10 @@
+const express = require('express');
+const tagController = require('../controllers/tagController');
+const auth = require('../middleware/auth');  // 若需登入才可新增 tag，可加 auth
+
+const router = express.Router();
+
+router.get('/', tagController.getAllTags);
+router.post('/', auth, tagController.createTag); // 可考慮不加 auth
+
+module.exports = router;