With the widespread popularity of electric bicycles and smart home devices, the multi-function and intelligent demand of charging pile system is increasing day by day. Based on this research, a multi-functional electric bicycle charging pile system based on STM32 is designed, which supports high voltage output, real-time data acquisition and display, user use function and safety alarm function. The system uses the Internet of Things technology to realize the remote monitoring and intelligent management of the charging pile, which improves the efficiency and security of the charging pile system. The system has good scalability and reliability, can adapt to the future development needs of charging piles, and through MQTT protocol access to OneNet platform, to achieve visual data transmission. It not only meets the charging needs of users, but also improves the efficiency and safety of the charging system.