The cable connector is one of the weak parts in the safe operation of power supply network, in this paper, base on a key science and technology projects of power company limited, for the characteristics of large number and wide distribution and other of urban areas power cable connector, use ISM band RF wireless communications and GSM network transmit data between host computer and on-site terminal devices, the present study provides a practicable way for the most economic, simple, stable and reliable realization of the wide coverage of the front-end monitoring network in the high voltage cable network.