diff --git a/backend/app/Service/ScopeBitmapService.php b/backend/app/Service/ScopeBitmapService.php
new file mode 100644
index 0000000..6dc9f06
--- /dev/null
+++ b/backend/app/Service/ScopeBitmapService.php
@@ -0,0 +1,176 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Model\Platform;
+use App\Model\Store;
+use App\Model\UserDataScope;
+
+class ScopeBitmapService
+{
+    /**
+     * 将 store_id 数组编码为 bitmap 二进制串
+     * store_id=N → bit N-1 置 1
+     *
+     * @param int[] $store_ids
+     * @return string
+     */
+    public function encode(array $store_ids): string
+    {
+        if (empty($store_ids)) {
+            return '';
+        }
+
+        $max_id = max($store_ids);
+        $byte_length = intdiv($max_id - 1, 8) + 1;
+        $bitmap = str_repeat("\0", $byte_length);
+
+        foreach ($store_ids as $store_id) {
+            $bit_pos = $store_id - 1;
+            $byte_index = intdiv($bit_pos, 8);
+            $bit_offset = $bit_pos % 8;
+            $bitmap[$byte_index] = chr(ord($bitmap[$byte_index]) | (1 << $bit_offset));
+        }
+
+        return $bitmap;
+    }
+
+    /**
+     * 将 bitmap 解码为 store_id 数组
+     *
+     * @param string $bitmap
+     * @return int[]
+     */
+    public function decode(string $bitmap): array
+    {
+        $store_ids = [];
+        $length = strlen($bitmap);
+
+        for ($i = 0; $i < $length; $i++) {
+            $byte = ord($bitmap[$i]);
+            if ($byte === 0) {
+                continue;
+            }
+
+            for ($bit = 0; $bit < 8; $bit++) {
+                if (($byte >> $bit) & 1) {
+                    $store_ids[] = $i * 8 + $bit + 1;
+                }
+            }
+        }
+
+        return $store_ids;
+    }
+
+    /**
+     * 检查 bitmap 中是否包含指定 store_id
+     *
+     * @param string $bitmap
+     * @param int $store_id
+     * @return bool
+     */
+    public function has(string $bitmap, int $store_id): bool
+    {
+        $bit_pos = $store_id - 1;
+        $byte_index = intdiv($bit_pos, 8);
+
+        if ($byte_index >= strlen($bitmap)) {
+            return false;
+        }
+
+        $bit_offset = $bit_pos % 8;
+        return (bool) ((ord($bitmap[$byte_index]) >> $bit_offset) & 1);
+    }
+
+    /**
+     * 合并多个 bitmap（OR 运算）
+     *
+     * @param string ...$bitmaps
+     * @return string
+     */
+    public function merge(string ...$bitmaps): string
+    {
+        $bitmaps = array_filter($bitmaps, fn(string $b): bool => $b !== '');
+
+        if (empty($bitmaps)) {
+            return '';
+        }
+
+        $max_len = max(array_map('strlen', $bitmaps));
+        $result = str_repeat("\0", $max_len);
+
+        foreach ($bitmaps as $bitmap) {
+            for ($i = 0; $i < strlen($bitmap); $i++) {
+                $result[$i] = chr(ord($result[$i]) | ord($bitmap[$i]));
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * 根据用户的 user_data_scopes 记录构建 scope bitmap
+     * 处理 company/platform/store 三种 scope_type 的解析和合并
+     *
+     * @param int $user_id
+     * @return string
+     */
+    public function buildForUser(int $user_id): string
+    {
+        $scopes = UserDataScope::query()->where('user_id', $user_id)->get();
+
+        if ($scopes->isEmpty()) {
+            return '';
+        }
+
+        $store_ids = [];
+        $grouped = $scopes->groupBy('scope_type');
+
+        // company 类型：查该 company 下所有 store
+        if ($company_scopes = $grouped->get('company')) {
+            $company_ids = $company_scopes->pluck('scope_id')->toArray();
+            $store_ids = array_merge(
+                $store_ids,
+                Store::query()->whereIn('company_id', $company_ids)->pluck('id')->toArray()
+            );
+        }
+
+        // platform 类型：查该 platform 下所有 store
+        if ($platform_scopes = $grouped->get('platform')) {
+            $platform_ids = $platform_scopes->pluck('scope_id')->toArray();
+            $store_ids = array_merge(
+                $store_ids,
+                Store::query()->whereIn('platform_id', $platform_ids)->pluck('id')->toArray()
+            );
+        }
+
+        // store 类型：直接使用
+        if ($store_scopes = $grouped->get('store')) {
+            $store_ids = array_merge($store_ids, $store_scopes->pluck('scope_id')->toArray());
+        }
+
+        $store_ids = array_unique(array_map('intval', $store_ids));
+        return $this->encode($store_ids);
+    }
+
+    /**
+     * 根据 developer 维护的 platform 构建 scope bitmap
+     *
+     * @param int $user_id
+     * @return string
+     */
+    public function buildForDeveloper(int $user_id): string
+    {
+        $platform_ids = Platform::query()->where('developer_id', $user_id)->pluck('id')->toArray();
+
+        if (empty($platform_ids)) {
+            return '';
+        }
+
+        $store_ids = Store::query()->whereIn('platform_id', $platform_ids)->pluck('id')->toArray();
+        $store_ids = array_map('intval', $store_ids);
+        return $this->encode($store_ids);
+    }
+}
diff --git a/backend/app/Service/ScopeTableManager.php b/backend/app/Service/ScopeTableManager.php
new file mode 100644
index 0000000..61bdb74
--- /dev/null
+++ b/backend/app/Service/ScopeTableManager.php
@@ -0,0 +1,99 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Model\User;
+use Swoole\Table;
+
+class ScopeTableManager
+{
+    protected Table $table;
+
+    public function __construct(protected ScopeBitmapService $bitmapService)
+    {
+        $this->initTable();
+    }
+
+    /**
+     * 初始化 Swoole\Table
+     */
+    protected function initTable(): void
+    {
+        $this->table = new Table(1024);
+        $this->table->column('role', Table::TYPE_STRING, 32);
+        $this->table->column('scope', Table::TYPE_STRING, 4096);
+        $this->table->column('version', Table::TYPE_INT, 8);
+        $this->table->create();
+    }
+
+    public function getTable(): Table
+    {
+        return $this->table;
+    }
+
+    /**
+     * 获取用户 scope 数据，未命中时懒加载
+     *
+     * @param int $user_id
+     * @return array{role: string, scope: string, version: int}|null
+     */
+    public function getUserScope(int $user_id): ?array
+    {
+        $key = (string) $user_id;
+        $row = $this->table->get($key);
+
+        if ($row !== false) {
+            return $row;
+        }
+
+        // Table 未命中，从数据库加载
+        return $this->rebuildUserScope($user_id);
+    }
+
+    /**
+     * 重建用户 scope 并写入 Table
+     *
+     * @param int $user_id
+     * @return array{role: string, scope: string, version: int}|null
+     */
+    public function rebuildUserScope(int $user_id): ?array
+    {
+        $user = User::query()->with('role')->find($user_id);
+        if (!$user || !$user->role) {
+            return null;
+        }
+
+        $role_name = $user->role->name;
+
+        // administrator 不需要 bitmap
+        if ($role_name === 'administrator') {
+            $bitmap = '';
+        } elseif ($role_name === 'developer') {
+            $bitmap = $this->bitmapService->buildForDeveloper($user_id);
+        } else {
+            $bitmap = $this->bitmapService->buildForUser($user_id);
+        }
+
+        $data = [
+            'role' => $role_name,
+            'scope' => $bitmap,
+            'version' => time(),
+        ];
+
+        $this->table->set((string) $user_id, $data);
+        return $data;
+    }
+
+    /**
+     * 清除用户 scope（权限变更时先清再重建）
+     *
+     * @param int $user_id
+     * @return void
+     */
+    public function invalidateUser(int $user_id): void
+    {
+        $this->table->del((string) $user_id);
+    }
+}