diff --git a/app/Modules/Inventory/Controllers/ProductController.php b/app/Modules/Inventory/Controllers/ProductController.php
index 7b8ee91..a9a0b8d 100644
--- a/app/Modules/Inventory/Controllers/ProductController.php
+++ b/app/Modules/Inventory/Controllers/ProductController.php
@@ -196,10 +196,6 @@ class ProductController extends Controller
             $validated['code'] = $this->generateRandomCode();
         }
 
-        if (!isset($validated['is_active'])) {
-            $validated['is_active'] = true;
-        }
-
         $product = Product::create($validated);
 
         return redirect()->route('products.index')->with('success', '商品已建立');
@@ -263,10 +259,6 @@ class ProductController extends Controller
             $validated['code'] = $this->generateRandomCode();
         }
 
-        if (!isset($validated['is_active'])) {
-            $validated['is_active'] = true;
-        }
-
         $product->update($validated);
 
         if ($request->input('from') === 'show') {
diff --git a/database/migrations/tenant/2026_02_05_161624_add_is_active_to_products_table.php b/database/migrations/tenant/2026_02_05_161624_add_is_active_to_products_table.php
new file mode 100644
index 0000000..15f01d7
--- /dev/null
+++ b/database/migrations/tenant/2026_02_05_161624_add_is_active_to_products_table.php
@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('products', function (Blueprint $table) {
+            $table->boolean('is_active')->default(true)->after('wholesale_price')->comment('是否啟用');
+        });
+
+        // 更新現有資料為啟用
+        \DB::table('products')->whereNull('is_active')->orWhere('is_active', false)->update(['is_active' => true]);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('products', function (Blueprint $table) {
+            $table->dropColumn('is_active');
+        });
+    }
+};
diff --git a/database/seeders/UpdateProductsActiveSeeder.php b/database/seeders/UpdateProductsActiveSeeder.php
new file mode 100644
index 0000000..3ef4c6c
--- /dev/null
+++ b/database/seeders/UpdateProductsActiveSeeder.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Seeder;
+use App\Modules\Inventory\Models\Product;
+
+class UpdateProductsActiveSeeder extends Seeder
+{
+    public function run(): void
+    {
+        Product::query()->update(['is_active' => true]);
+    }
+}