Regional land resources and eco-environment database system (RSEDBS) for Zigui County in the Three Gorges area was established based on computer and GIS technology'spatial database managed by ARC/INFO GIS was shared with attributive database managed by Visual FoxPro through common Identifi cation Code (ID).Model base that includes application models such as DEM,AHP,Fuzzy Mathematics and comprehensive environment index etc were developed using computer program language C++'spatial database,attributive database and model base were integrated by internal and external interfaces and applied in quantitative evaluation of eco-environmental quality of Zigui County.The research results illustrated that towns with better eco-environmental quality mainly lie in southwest mountainous areas with high vegetation coverage,less population and rich rainfall.Whereas,towns with worse eco-environmental quality were mainly located on both sides of Yangtze River with lower vegetation coverage,large population,insufficient rainfall and soil erosion.Therefore,population,resources and environment must be optimized based on rational ecological characteristics to achieve sustainable use of land resources in Zigui County.