An acousto-optic control system was designed for expelling birds， which took the STM32 microprocessor as the core to build the hardware control system，and the implementation of hardware circuit was given.To solve the problem of bird adaptability, the function of switching different gear positions was designed. In order to verify the performance of the system, the measured LED spot area was divided into equal areas, and its illumination was tested.The results showed that the illumination of the designed system could reach more than 200 Lx, which could provide a reference for designing a new type of bird repellent system.