Infrared polarization imaging can improve the ability to detect camouflage or stealth targets. As a reconnaissance means against infrared stealth, the infrared polarization imaging technology has become an important research content at home and abroad. By analyzing the progress of infrared polarization imaging, the infrared polarization imaging technology is suggested to be used in target detection. To study the polarization scattering characteristics of camouflage targets, an infrared polarization imaging system is used to detect the target scenes with and without three-color camouflage nets. It is found that the infrared polarization imaging can be used as a new approach to the detection of camouflage or stealth targets and it has a good imaging result. In addition, the research shows that the unique advantage of polarization detection in recognition of camouflage targets with low reflectivity against complex background is also valid in the mid-infrared wavelength band. Moreover, the polarization angle imaging is very sensitive to the external physical characteristics of camouflage nets.