Polarimetric characteristic of scattering light was used in the polarization remote sensing to identify targets. It is a new method of detection with several advantages compared with traditional radiant intensity remote sensing. To study the effect of polarization stealth, polarimetric characteristics of camouflage net and images of polarization degree were measured under different conditions. The results indicate that polarimetric characteristics of camouflage net were influenced by several factors, such as conditions of illumination, detection and characteristics of materials. The variation of polarization degree was represented as reverse ratio to the reflectance of surface and direct ratio to the incidence angle. Compared with that of meadow, the polarization degree of camouflage net was much higher and could be identified clearly. Camouflage net meeting the request of multi-spectral remote sensing has little effect when it comes to polarization remote sensing. Thus, polarization remote sensing brings new challenges to camouflage technique.