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Aiming at the problems of large coverage area of street lamps, backward management means, inability to remotely control the switching time according to the actual needs, inability to monitor the operation of each street lamp and so on, a scheme of street lamp control system based on narrowband Internet of things is designed to control the street lamps on demand, timely understand the energy consumption of each street lamp, and integrate the on-site human flow situation to achieve accuracy. Control, and finally achieve the purpose of energy conservation. The terminal uses STM32 chip as micro control core, narrowband Internet of things technology as transmission mode and Tianyi cloud platform as support system framework. It describes the design ideas of hardware and software of the system, formulates the communication protocol among street lamp controller, Tianyi cloud platform and background service system, and realizes street lamp controller, cloud platform and background service terminal. Information interaction between. The test and application results show that the controller system is stable and reliable, with good real-time data communication, which provides a favorable guarantee for energy-saving control and management of street lamps in the future.