The invention discloses an intelligent well lid monitoring system comprising a well lid, a lithium battery power module, a sensor module, an RTU module, a software system and a monitoring system; thelithium battery power module, the sensor module and the RTU module are installed on the back of the well lid, the sensor module is in communication connection with the RTU module, the lithium batterypower module is electrically connected with the RTU module, and the monitoring system is installed at the lower end of the well lid. By means of an independent design of the modules, the modules can be replaced independently, the replacement process is convenient, the replacement cost is low, the accuracy of monitoring the well lid is improved, the newest NB-LOT network is adopted, signals can penetrate through the well lid, stable transmission of data is guaranteed, the network cost is low, the inspection personnel do not need to open the well lid to modify the parameter information of the equipment when modifying the equipment parameter information on site, so that the labor cost is reduced, and the integral modular product is small in size, convenient for equipment installation and carrying, simple and convenient to construct, and capable of adapting to various well lids.