The system integrates data acquisition and transmission, with stable performance and high-cost performance. Through the use of a high-performance low-power microcontroller, it can realize data acquisition, storage, communication and remote management, and also GPS positioning, time synchronization, waterproof, anti-corrosion and other functions; The installation is simple and convenient, no wiring, no need to destroy the manhole cover and other facilities; It supports mobile APP interaction with extremely low power consumption. It uses the NBLOT network to send, realizes the application of the IoT, and effectively monitors the status of the well cover, including whether the cover is open or closed and its inclination angle.