Ping An Baiyun is an APP with access control equipment independently developed by Baiyun District Public Security Bureau, which can automatically open the door by mobile phone, solving the problems of traditional door opening methods, forgetting to bring the key, and cumbersome door opening. Support the mobile phone to automatically open the door when it is close to the entrance guard after opening the APP. When some models support the mobile phone running in the background, the APP can still open the door automatically. Through the unique identification and authentication of user identity, combined with system authority control, the security of opening the door is guaranteed. The automatic door opening range can be set according to the actual environment and usage habits, which improves the usability. At the same time, the APP also supports manual operation to open the door, laying the foundation for further deepening the construction of smart public security.