In this paper, we developed an infrared polarization imaging system. The system is composed of imaging lens, IR polarizing filter, medium wave IR detector, and image acquisition system. The design scheme of implementing target recognition with IR polarization imaging system was presented, and the IR Images with polarization information have been acquired by this system. On the basis of Stokes parameters and polarization IR images processing, the images of linear Stokes parameters (I, Q, U), the image of degree of linear polarization (P image) and the image of angle of polarization (X image) could been obtained. The image of PUX fusion image could be achieved by the pseudo color fusion. The results of actual experiment and quantitative analysis data confirm that the target in the processed images obtained from IR polarization imaging system is much clear than that in the original IR image.