Abstract This paper designs and implements a community access control system based on STM32 microcontroller minimum system technology. A power unit composed of steering gear and simple lifting rod device is designed. According to the actual demand, a display device composed of buzzer alarm device and display screen is designed. Considering the need of camera recognition, the program of camera recognition process is designed, the database is written, and the license plate of this area is stored in advance. The system can make the license plate can be recognized by the camera automatically, and through the comparison with the database, the lifting rod or the buzzer alarm is realized. The access control system is of great significance to the control of vehicle entering and leaving and the safety of the community.