The utility model provides a cable metallic layer temperature measurement system, including host computer, server, temperature data collection ware and cable joint, still include passive wireless temperature sensor, the host computer is connected with server and temperature data collection ware electricity respectively, the temperature data collection ware with passive wireless temperature sensor wireless connection, and passive wireless temperature sensor and cable joint erection joint. Recording cable metallic layer temperature through passive wireless temperature sensor, transmitting data acquisition module through radiofrequency signal again, collection module does AD conversion back and is transmitted for the temperature measurement host computer by the bus, and the host computer passes through GPRS or optic fibre conveys to the server to the realization in time reflects trouble information to the cable metallic real -time on -line monitoring in layer, can effectively foresee cable fault hidden danger, and guides the timely feedback to give the staff maintenance at cable fault position, has reduced the trouble incidence. Electric power system's security is greatly improved.