Temperature is one of the most important parameters to evaluate the status of electric equipments. In this paper, a temperature monitor and query system based on virtual instruments and infrared temperature monitoring technical is introduced, including the hardware build-up and software realization. The system a multiple function system, including measurement and control parameter setting; data acquisition and processing; data, chart and graph displaying; signal processing and analyzing; data saving and so on. It can meet the need of the precision request in the temperature measurement of electrical equipment. Also it can be applied in other related experiments and developed further.