the infrared stealthy theory is introduced simply, the two kinds of methods for realization of infrared stealth are educed. Then, the measures of infrared stealth are described in detail all over the world. At the same time, it is pointed out that the development of the infrared stealth materials is the basis for the development of infrared stealth technology. And expounds the performance characteristics of the stealthy materials in detail. Finally, the development trend of infrared stealth technology are analyzed.