A new polarization imaging method, based on polarization state, is developed to obtain the spatial distribution of polarization state of object. A measurable physical quantity, called polarized-chromatic value, is introduced to describe the polarization state. The Stokes parameters employed to describe the polarization state are converted to three basic colors RGB, then the chromatic value of the RGB is used to describe the polarization state, therefore there is a one-to-one relationship between the polarized-chromatic value and the polarization state, and the polarized-chromatic value and the pixels. On this basis, the Stokes parameters measurement method is used for object point measurement to obtain the spatial distribution of Stokes parameters of the object. Then through the distribution of polarized-chromatic value, space distribution of the polarization state of the object is characterized, and thus the polarization imaging is realized. The experimental results show that the polarizaion state imaging method not only can measure the distribution of the stress size, but also measure the distribution of the stress direction.