Based on the bidirectional reflectance distribution function model, the paper establishes infrared radiation transmission equation of object surface. We deduce the mathematical model with respect to a lot of factors of the degree of polarization. Aim at the infection of circumstance factors, a lot of experiment of the infrared polarization and the infrared hyper-spectral polarization imaging about different material and standard blackbody were developed. The result show that the infrared degree of polarization of blackbody is not relate to waved length, and the method of infrared polarization quantitative analysis is put forward that is based on the infrared polarization characteristics of standard blackbody.