Transient temperature testing technology research of explosion experiment in airtight container includes the sensor selection, remote transmission module design，anti-interference signal long-distance transmission，measuring point layout and protection, and many other technical problems. The development of the transient temperature measurement technology, the configuration of transient temperature test system of explosion experiments in sealed containers，the hardware and software design concepts，implementation process and key technology solutions, the layout of measuring points and protection design are introduced. The testing system is applied to obtain an experimental transient temperature data successfully for the first time.