diff --git a/apps/cms/stats.py b/apps/cms/stats.py
index ecfd1a0..cb4450f 100644
--- a/apps/cms/stats.py
+++ b/apps/cms/stats.py
@@ -18,6 +18,7 @@ from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 
 from apps.user.models import User, Institution, Department, TeacherStudentRelation
+from apps.user.views import _build_banner_url
 from apps.case.models import CaseBase
 from apps.training.models import TrainingRecord, TrainingSession
 from apps.user.stats import STANDARD_DIMS, DIMENSION_MAP, _dimension_scores, _NORM_TOTAL_EXPR
@@ -282,7 +283,7 @@ def hospital_overview(request):
     profile = {
         'institution_id': inst_id,
         'name': inst.name if inst else '',
-        'logo': inst.banner_url if inst else '',
+        'logo': _build_banner_url(request, inst.banner_url) if inst else '',   # 完整 URL（含 STATIC_PUBLIC_PREFIX）
         'level': inst.level if inst else '',
         'cooperation_days': (now - inst.created_at).days if inst and inst.created_at else None,
     }
diff --git a/apps/organization/views.py b/apps/organization/views.py
index ff9efe6..f082f0f 100644
--- a/apps/organization/views.py
+++ b/apps/organization/views.py
@@ -102,16 +102,18 @@ class CmsInstitutionViewSet(viewsets.ModelViewSet):
         if ext not in ALLOWED_BANNER_EXT:
             raise AppError('CMS_BANNER_BAD_TYPE', '仅支持 png/jpg/jpeg/webp 图片', status_code=400)
 
-        rel_dir = 'institutions'
+        # 上传图片落在 static/uploads/ 下——该目录由 Docker 持久卷挂载（容器重启不丢），
+        # 与镜像内置静态（如 institutions/default_hospital.png）分开，避免被卷覆盖。
+        rel_dir = 'uploads/institutions'
         base_static = settings.STATICFILES_DIRS[0]
-        target_dir = os.path.join(base_static, rel_dir)
+        target_dir = os.path.join(base_static, 'uploads', 'institutions')
         os.makedirs(target_dir, exist_ok=True)
         filename = f'inst_{inst.id}_banner{ext}'
         with open(os.path.join(target_dir, filename), 'wb') as fh:
             for chunk in file.chunks():
                 fh.write(chunk)
 
-        inst.banner_url = f'{rel_dir}/{filename}'
+        inst.banner_url = f'{rel_dir}/{filename}'   # 例：uploads/institutions/inst_17_banner.png
         inst.save(update_fields=['banner_url', 'updated_at'])
 
         serializer = self.get_serializer(inst)
diff --git a/test/test_cms_institution.py b/test/test_cms_institution.py
index 462391e..1d89385 100644
--- a/test/test_cms_institution.py
+++ b/test/test_cms_institution.py
@@ -205,9 +205,10 @@ class CmsInstitutionBannerTest(CacheTestCase):
         self.assertEqual(resp.status_code, 200, resp.content)
         body = resp.json()
         self.assertEqual(body['message'], '上传成功')
-        self.assertTrue(body['banner_url'].endswith(f'/static/institutions/inst_{self.inst.id}_banner.png'))
+        # 上传图片落在持久卷目录 static/uploads/institutions/（与镜像内置静态分开）
+        self.assertTrue(body['banner_url'].endswith(f'/static/uploads/institutions/inst_{self.inst.id}_banner.png'))
         self.inst.refresh_from_db()
-        self.assertEqual(self.inst.banner_url, f'institutions/inst_{self.inst.id}_banner.png')
+        self.assertEqual(self.inst.banner_url, f'uploads/institutions/inst_{self.inst.id}_banner.png')
 
     def test_upload_no_file(self):
         with override_settings(STATICFILES_DIRS=[self._tmp]):