diff --git a/attendance_iot/models/attendance_iot_user.py b/attendance_iot/models/attendance_iot_user.py
index f48452e2b..e0b36edaa 100644
--- a/attendance_iot/models/attendance_iot_user.py
+++ b/attendance_iot/models/attendance_iot_user.py
@@ -61,8 +61,8 @@ class AttendanceIotUser(models.Model):
             if r.employee_id.avatar_image:
                 raw = r.employee_id.avatar_image
                 b64 = base64.b64encode(raw).decode('ascii')
-                face_template = urllib.parse.quote(
-                    f"data:image/jpeg;base64,{b64}", encoding='utf-8')
+                # 设备要求：base64 字符串 + URL 编码，不要 data:image/... 前缀
+                face_template = urllib.parse.quote(b64, encoding='utf-8')
                 add_value.update({'face_template': face_template})
             self.env['iot.message'].create([{
                 'name': '增加用户',
@@ -87,8 +87,8 @@ class AttendanceIotUser(models.Model):
             if record.employee_id.avatar_image:
                 raw = record.employee_id.avatar_image
                 b64 = base64.b64encode(raw).decode('ascii')
-                face_template = urllib.parse.quote(
-                    f"data:image/jpeg;base64,{b64}", encoding='utf-8')
+                # 设备要求：base64 字符串 + URL 编码，不要 data:image/... 前缀
+                face_template = urllib.parse.quote(b64, encoding='utf-8')
                 update_value.update({'face_template': face_template})
             _logger.info(f"action_update_iot_info--{update_value}")
             self.env['iot.message'].create([{