Abstract: The comparison research of infrared radiation characteristics of target and background was important for the infrared-guided and infrared stealth topics. The infrared radiation characteristics contrast between target and background on different grounds was researched in this paper. Firstly, the formula of infrared radiation characteristic of target was analyzed, then the different algorithm with different background-soil and cement was obtained. After the experiment, the transformation about the vehicle and background in different grounds was got by the temperature increase. Meanwhile, the achieved temperature of target with different emissivity in soil ground and cement ground were educed. The results also can provid the data support to target stealth in future.