Abstract: The research of the infrared stereo feature of ground target is useful for describing the detail of infrared feature, and it plays an important role in the field of infrared image simulation,infrared target recognition and controlling the target infrared radiation to realize infrared camouflage and so on. In this paper, the various factors that influence the target surface temperature were analyzed, then the model for the calculation of target surface temperature was introduced. The relation between temperature and time for some building wall outside surface by daylight was calculated using one dimension heat conduction differential equation. It proves that the calculation method is correct according to the comparison between the result value and the measured value. On the basis of the calculation of temperature, the infrared radiation was calculated and discussed. The result shows that the infrared stereo feature of ground target is more obvious in day than in night.