The infrared feature of the satellite has important significance to the identifying of the satellite and the distinguishing of the working satellite and the non-working satellite. The view factor of the sun direct radiation is calculated according to the locations of the sun, the earth and the satellite. The view factor of the albedo and the earth infrared radiation are calculated with the random method. The temperature control equation is established, and the radiation heat transfer is calculated with the concept of the radiation transfer coefficient and the Monte-Carlo method. The method of calculating the infrared feature of the satellite is discussed, and the infrared feature of the satellite is calculated and analyzed. It can be concluded from the results that the satellite can be found and identified more easily in the sunlight region, and the heat exchange surface of the satellite can be as the characteristic position for distinguishing the working satellite and the non-working satellite.