The experimental setup for polarization imaging based on dual-rotating-retarder technique is modified, and a method to obtain two images encoded by polarization degree and intensity with a single measurement process is proposed. The optical intensity method is used to the laser remote sensing polarization imaging equipment. Through the application of Stokes and Mueller matrices for polarization elements, the principle, method and process of corresponding optical elements adjustment are given. The influence of laser central wavelength variation, polarizer angle error, wave plate phase retardance and angle errors on the whole system is analyzed. The results show that the emitted Stokes error caused by the angle error of polarizer and wave plate is less than 0.001, and can be neglected. The error caused by the retardance accuracy of wave plate is about 0.02, so the wave plate with higher accuracy should be selected. The influence caused by variation of laser central wavelength is the largest, and cannot be neglected, so a filter should be added to control the central wavelength of the received light at 808 nm. Telescope coated with aluminium has little influence on the polarization degree of scattered light, and it is suitable for the laser remote sensing polarization imaging system.