diff --git a/backend-spring/src/main/java/com/erp/crosstenant/CrossTenantDeptController.java b/backend-spring/src/main/java/com/erp/crosstenant/CrossTenantDeptController.java
new file mode 100644
index 00000000..d7245db4
--- /dev/null
+++ b/backend-spring/src/main/java/com/erp/crosstenant/CrossTenantDeptController.java
@@ -0,0 +1,83 @@
+package com.erp.crosstenant;
+
+import com.erp.service.AdminService;
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * SUPER_ADMIN 의 cross-tenant 부서 조회 — 사용자 등록/수정 폼의 "부서" dropdown 을
+ * 선택된 회사 DB 기준으로 채우기 위한 보조 endpoint.
+ *
+ * 단일 회사 모드의 {@code GET /api/admin/departments} 와 응답 형태 동일.
+ * 차이점: company_code 가 query param 으로 명시되고, 그 회사 DB 컨텍스트로 임시 전환.
+ *
+ * @see CrossTenantUserController
+ * @see com.erp.controller.AdminController#getDepartmentList  // 단일 모드 원본
+ */
+@RestController
+@RequestMapping("/api/admin/cross-tenant/departments")
+@RequiredArgsConstructor
+@Slf4j
+public class CrossTenantDeptController {
+
+    private final CrossTenantExecutor executor;
+    private final AdminService adminService;
+
+    /**
+     * GET /api/admin/cross-tenant/departments?company_code=TEST02
+     * 응답 구조는 단일 모드와 동일: { success, data: { departments, flat_list }, total, total_count }
+     */
+    @GetMapping
+    public ResponseEntity<Map<String, Object>> listDepartments(
+            HttpServletRequest request,
+            @RequestParam("company_code") String companyCode) {
+        if (!CrossTenantContext.isSuperAdmin(request)) {
+            return ResponseEntity.status(HttpStatus.FORBIDDEN)
+                    .body(errorBody("super_admin_required", request.getRequestURI()));
+        }
+        if (!CrossTenantContext.isMetaContext()) {
+            return ResponseEntity.status(HttpStatus.BAD_REQUEST)
+                    .body(errorBody("cross_tenant_requires_meta_context", request.getRequestURI()));
+        }
+
+        try {
+            Map<String, Object> serviceResult = executor.runInCompany(companyCode, () -> {
+                Map<String, Object> params = new HashMap<>();
+                params.put("company_code", companyCode);
+                return adminService.getDepartmentList(params);
+            });
+
+            int total = ((Number) serviceResult.get("total")).intValue();
+
+            Map<String, Object> data = new LinkedHashMap<>();
+            data.put("departments", serviceResult.get("departments"));
+            data.put("flat_list", serviceResult.get("flat_list"));
+
+            Map<String, Object> response = new LinkedHashMap<>();
+            response.put("success", true);
+            response.put("data", data);
+            response.put("message", "부서 목록 조회 성공");
+            response.put("total", total);
+            response.put("total_count", total);
+            return ResponseEntity.ok(response);
+        } catch (IllegalArgumentException e) {
+            return ResponseEntity.badRequest().body(errorBody(e.getMessage(), request.getRequestURI()));
+        }
+    }
+
+    private Map<String, Object> errorBody(String message, String path) {
+        Map<String, Object> body = new LinkedHashMap<>();
+        body.put("success", false);
+        body.put("message", message);
+        body.put("path", path);
+        return body;
+    }
+}
diff --git a/frontend/components/admin/UserFormModal.tsx b/frontend/components/admin/UserFormModal.tsx
index e58d10fb..00fe6861 100644
--- a/frontend/components/admin/UserFormModal.tsx
+++ b/frontend/components/admin/UserFormModal.tsx
@@ -271,6 +271,14 @@ export function UserFormModal({ isOpen, onClose, onSuccess, editingUser }: UserF
       return;
     }
 
+    // SUPER_ADMIN(메타) 은 어느 회사에서 체크할지 먼저 골라야 함.
+    // 회사별 USER_INFO 라 회사 미선택 상태에선 체크 의미가 없음.
+    if (isSuperAdmin && !formData.company_code) {
+      setDuplicateCheckMessage("회사를 먼저 선택해주세요.");
+      setDuplicateCheckType("error");
+      return;
+    }
+
     try {
       // cross-tenant 모드: 회사별 USER_INFO 라 그 회사 코드와 함께 중복 체크.
       // 단일 모드: 두번째 인자 무시 (백엔드가 JWT.company_code 사용).
@@ -447,6 +455,48 @@ export function UserFormModal({ isOpen, onClose, onSuccess, editingUser }: UserF
           </DialogHeader>
 
           <div className="space-y-6 py-4">
+            {/* 회사 선택 — 모든 후속 입력의 컨텍스트라 가장 위 */}
+            <div className="space-y-2">
+              <Label htmlFor="companyCode" className="text-sm font-medium">
+                회사 <span className="text-destructive">*</span>
+              </Label>
+              {isSuperAdmin ? (
+                <>
+                  <Select
+                    value={formData.company_code}
+                    onValueChange={(value) => handleInputChange("company_code", value)}
+                  >
+                    <SelectTrigger>
+                      <SelectValue placeholder="회사 선택" />
+                    </SelectTrigger>
+                    <SelectContent>
+                      {companies.map((company) => (
+                        <SelectItem key={company.company_code} value={company.company_code}>
+                          {company.company_name}
+                        </SelectItem>
+                      ))}
+                    </SelectContent>
+                  </Select>
+                  <p className="text-muted-foreground text-xs">
+                    회사를 먼저 선택해야 사용자 ID 중복확인과 부서 선택이 가능합니다.
+                  </p>
+                </>
+              ) : (
+                <>
+                  <Input
+                    id="companyCode"
+                    value={
+                      companies.find((c) => c.company_code === formData.company_code)?.company_name ||
+                      formData.company_code
+                    }
+                    disabled
+                    className="bg-muted cursor-not-allowed"
+                  />
+                  <p className="text-muted-foreground text-xs">회사는 최고 관리자만 변경할 수 있습니다.</p>
+                </>
+              )}
+            </div>
+
             {/* 기본 정보 */}
             <div className="grid grid-cols-2 gap-4">
               <div className="space-y-2">
@@ -460,17 +510,18 @@ export function UserFormModal({ isOpen, onClose, onSuccess, editingUser }: UserF
                     <div className="flex gap-2">
                       <Input
                         id="userId"
-                        placeholder="사용자 ID 입력"
+                        placeholder={isSuperAdmin && !formData.company_code ? "회사 먼저 선택" : "사용자 ID 입력"}
                         value={formData.user_id}
                         onChange={(e) => handleInputChange("user_id", e.target.value)}
                         onKeyDown={handleKeyDown}
+                        disabled={isSuperAdmin && !formData.company_code}
                         className="flex-1"
                       />
                       <Button
                         type="button"
                         variant={isUserIdChecked && lastCheckedUserId === formData.user_id ? "default" : "outline"}
                         onClick={checkUserIdDuplicate}
-                        disabled={!formData.user_id.trim() || isLoading}
+                        disabled={!formData.user_id.trim() || isLoading || (isSuperAdmin && !formData.company_code)}
                         className="whitespace-nowrap"
                       >
                         {isUserIdChecked && lastCheckedUserId === formData.user_id ? "확인완료" : "중복확인"}
@@ -534,48 +585,6 @@ export function UserFormModal({ isOpen, onClose, onSuccess, editingUser }: UserF
               </div>
             )}
 
-            {/* 회사 선택 */}
-            <div className="space-y-2">
-              <Label htmlFor="companyCode" className="text-sm font-medium">
-                회사 <span className="text-destructive">*</span>
-              </Label>
-              {isSuperAdmin ? (
-                <>
-                  <Select
-                    value={formData.company_code}
-                    onValueChange={(value) => handleInputChange("company_code", value)}
-                  >
-                    <SelectTrigger>
-                      <SelectValue placeholder="회사 선택" />
-                    </SelectTrigger>
-                    <SelectContent>
-                      {companies.map((company) => (
-                        <SelectItem key={company.company_code} value={company.company_code}>
-                          {company.company_name}
-                        </SelectItem>
-                      ))}
-                    </SelectContent>
-                  </Select>
-                  <p className="text-muted-foreground text-xs">
-                    권한 관리는 별도의 권한 관리 페이지에서 설정할 수 있습니다.
-                  </p>
-                </>
-              ) : (
-                <>
-                  <Input
-                    id="companyCode"
-                    value={
-                      companies.find((c) => c.company_code === formData.company_code)?.company_name ||
-                      formData.company_code
-                    }
-                    disabled
-                    className="bg-muted cursor-not-allowed"
-                  />
-                  <p className="text-muted-foreground text-xs">회사는 최고 관리자만 변경할 수 있습니다.</p>
-                </>
-              )}
-            </div>
-
             {/* 부서 정보 */}
             <div className="grid grid-cols-2 gap-4">
               <div className="space-y-2">
diff --git a/frontend/lib/api/user.ts b/frontend/lib/api/user.ts
index 52d8e458..db327caa 100644
--- a/frontend/lib/api/user.ts
+++ b/frontend/lib/api/user.ts
@@ -219,8 +219,23 @@ export async function getCompanyList() {
 
 /**
  * 부서 목록 조회
+ *
+ * cross-tenant 모드: companyCode 가 가리키는 회사 DB 의 부서. 미선택이면 빈 배열.
+ *   (회사를 안 골랐는데 메타 DB 부서를 보여주면 다른 회사 부서가 섞여 보이는 버그 방지)
+ * 단일 모드: 기존 /admin/departments — 백엔드가 JWT.company_code 사용.
  */
 export async function getDepartmentList(companyCode?: string) {
+  if (isCrossTenantMode()) {
+    if (!companyCode) return [];
+    const response = await apiClient.get(
+      `/admin/cross-tenant/departments?company_code=${encodeURIComponent(companyCode)}`
+    );
+    if (response.data.success && response.data.data) {
+      return response.data.data.departments || [];
+    }
+    throw new Error(response.data.message || "부서 목록 조회에 실패했습니다.");
+  }
+
   const params = companyCode ? `?companyCode=${encodeURIComponent(companyCode)}` : "";
   const response = await apiClient.get(`/admin/departments${params}`);