The utility model relates to a wireless monitoring alarm system is decreased in theftproof of electric power well, including the surveillance center of installing the monitoring device in each electric power well respectively and being connected with each monitoring device communication, every monitoring device of group connects to form by well lid state detector, GPRS alarm and GPS locator to connect the group battery through power module, wherein the GPRS alarm includes microprocessor and GPRS wireless communication module, and GPRS wireless communication module passes through cloud server connection surveillance center, the surveillance center includes router, server and monitor. The utility model discloses can implement quick the warning and the accurate positioning to improper the opening of electric power well well lid, it is low that the system has manufacturing, installation, running cost, detects sensitively, and the quick accurate advantage in location is applicable to the whole networking protection of urban electric power well to wrong report in the time of can avoiding normally maintaining is alert, has very strong practical application and worth.