Using the principle of surface acoustic wave temperature measurement, the temperature information into electromagnetic wave frequency signal components. Temperature sensor is directly installed on the surface of the measured object temperature components, it is responsible for receiving the radio frequency signal, and return the radio signal with temperature information to the collector, when the temperature sensor works normally, it does not need external power supply such as battery, CT loop power supply. The signal field transmission between the temperature sensor and the temperature collector is realized by wireless electromagnetic waves.