A centralized monitoring system of a cable inspection well comprises a well lid protection monitoring center, a cable well state monitoring device and a data communication channel, wherein the cable well state monitoring device is controlled by a junction management unit, can realize control over an electromagnetic lock by using the interconnection characteristic of wireless or cable pipelines and adopting wireless or wired connection, and has the functions of well lid opening state monitoring, intra-well accumulated water monitoring and well lid crack detection. The system conducts network control over all cable inspection wells in a control range through a centralized monitoring device of the cable inspection well, and detects the opening and closing state, as well as the deformation, of a lid of the cable inspection well at real time. According to the request of a normal constructor, the centralized monitoring device of the cable inspection well authorizes the operations of well startup, well shutdown and the like with the system controlling the state of the cable inspection well on the spot. When the lid of the cable well is started illegally, lost, cracked or deformed and the like, the system timely gives an alarm to a monitoring center and directs and assigns maintenance personnel to handle in a centralized manner.