The utility model relates to an operating temperature measuring device based on surface acoustic wave for a conductor connection point in a switch cabinet. The technical feature is that the operating temperature measuring device comprises an SAW temperature sensor mounted on a conductor connection point in a switch cabinet and a temperature acquisition processing device mounted outside the switch cabinet, wherein the SAW temperature sensor is connected with the temperature acquisition processing device through a wireless radio frequency manner. According to the operating temperature measuring device, the SAW temperature sensor is mounted on the conductor connector of the switch cabinet, signal transmission and high-voltage isolation are carried out by adopting the surface acoustic wave (SAW) sensing technology and the wireless communication technology, the intrinsic insulativity and electromagnetic field interference resisting performance are utilized, the difficulty that the temperature of the conductor connection point in the switch cabinet is not easy to monitor is solved fundamentally, the measuring precision and measuring efficiency are improved, the equipment maintenance frequency is reduced, and the installation and maintenance costs are decreased.