Abstract: Based on the data of the 1981 topographic map and the 1997 landsat TM images of the area, dynamic changes in the lacustrine resources of the Dazonghu Lake and the Wugonghe Lake were investigated by means of RS and GIS. It was found that the areas and the storage capacities for flood detention of the two lakes have dropped significantly due to inning along the lakes for aquatic breeding, thus bringing about adverse effect on flood retention and transportation in the area, which in turn directly affect sustainable development of the social economy of the region. Aimed at the problem of shrinkage in the lake areas, corresponding countermeasures were brought forth for conservation of the lacustrine resources and sustainable development of the economy and as scientific basis for reference in rationalizing the utilization of the lacustrine resources.