Abstract: In order to further improve the operational efficiency and safety level of overhead passenger facility in coal mines, and to address the current problems of multiple blind spots in monitoring, inconvenient fault handling, and high labor intensity of monitoring personnel, intelligent monitoring and variable frequency speed regulation technology of overhead passenger facility are studied.A design scheme for an unmanned online monitoring system of overhead passenger facility based on PLC control and Ethernet communication is proposed.The system adopts PLC+frequency converter joint control to achieve remote automatic control of the start stop and speed regulation of the overhead passenger facility, and combines multi-sensor fusion detection technology to achieve real-time collection and monitoring of core operating parameters such as facility operating speed, reducer oil temperature and oil level, effectively improving the transportation efficiency and monitoring level of the overhead passenger facility, ensuring the safe, stable and efficient operation of facility.