This study aims to reveal the spatial distribution of water resources and meet the various demands for geological survey, geological disaster prediction, facility agriculture,and constructions of industrial and agricultural bases, as well as the development and utilization of precipitation resources.Twenty-four spatial distribution models of water resources in Hulun Buir City are constructed by using GIS techniques and Pu Baofu theory on climate resource simulation. Water resources in the city are manipulated in a number of "3×3" mini grids.Thirty-four out of the 41 models pass the very significant test, and 7, the significant test. The average relative errors of tests for the models are between-5% and 5%. In this way, the rapid and accurate calculation of water resources has been accomplished.Accordingly, the spatial distribution of water resources is analyzed. The study lays a scientific foundation for the sufficient and rational use of water resources in the region.