The utility model discloses an ultrasonic wave partial discharge measurement system under site environment, including backstage control platform and distal end measuring device, backstage control platform includes host computer and first light transmitting and receiving module, the host computer is connected with first light reflection and reception module, distal end measuring device includes that second light transmitting and receiving module, standard signal produce module, standard signal conditioning module, wide band power amplification module, impedance matcher, ultrasonic transducer, standard microphone, wide band acoustic emission collection module, transmitting and receiving module 0 and distal end transmitting and receiving module 1, the utility model provides an ultrasonic wave partial discharge measurement system under site environment has strengthened putting the technological control ability who overhauls measured data accuracy, reliability to ultrasonic wave office, but the operating electrified detecting instrument of effective supervision and on -line monitoring device measured data's reliability, and the supervise of on -line monitoring device measured data's accuracy and reliability is put in the enhancement to ultrasonic wave office.