Depending on the capability of detecting scene radiance in both MWIR(middle wave infrared radiation) and LWIR(long wave infrared radiation) spectral bands, the dual-band IR(infrared radiation) technology ensures the use of two single-band sensors. Using the spectral advantages associated with the use of two single-band sensors, the dual-band IR technology can improve all-weather performance and the probability of mission success in almost all cases. Over the past 20 years, main occident have developed from dual-camera dual-band to single-camera dual-band infrared camera systems and equipped military, with higher resolution and greater range being the current requirements. At present, the dual-band IR technology mainly has three different applications. First, it improves the adaptability to different operational environments. Second, it improves the target detection and recognition probability of automatic systems. Third, through deep data processing, it is used to obtain more information about the target such as temperature and spectral feature, which helps prevent jammer and camouflage.