The algorithm of ATCOR3 was introduced. Then the algorithm was applied to correct two scene TM imageries of Tongling and Huangshan of Anhui Province. By the method of eye comparison and NDVI analyzing, the effect of the correction was analyzed. The results show that the influence of haze on images is effectively eliminated. Atmospheric correction result by the ATCOR3 and the ATCOR2 was compared, and it indicated that the ATCOR3 restore was better than ATCOR2 when the original appearance of the surface was rugged terrain.