Infrared camera working environment temperature cannot exceed 50 ℃, but in some industrial high temperature occasion, it needs to continue to work at about 300 ℃ environment. Aiming at this problem,a three-state heat insulation cooling device for a certain type of infrared camera was designed.The device had the three-state matter thermal insulation cooling effect including the heat insulation block transmission, water cooling, air cooling heat cooling, at the same time,it had the function of self-cleaning quartz glass.The heat transfer performance was verified through the heat transfer module in COMSOL, and the temperature field in the internal space was analyzed.The results show that by using the designed three-state heat insulation cooling device, the temperature of the infrared camera can be kept below 50 ℃ under the ambient temperature about 300 ℃, and the normal operation of the infrared camera can been sured.