This research is based on the Wulong mountain pumped storage power project in Hills red soil region of Zhejiang province.First the land-use maps and vegetation maps before and after the construction are generated with ARCVEW software,by using the SPOT images in 2004 as the basic information sources,the project initial design as the bases,and by ways of material collection,field work,quadrat investigation and analysis of satellite and aero images.With these maps,three evaluation factors(land-use,vegetation and eco-integrity) are chosen to analyze the potential effect of the construction on the ecological environment.The result shows that the effect brings certain impact on land-use and vegetation of the area(namely,an increase in land-use types,a slight change in the area of each type,no change in vegetation types,and adecrease in vegetation area,biomass and productivity value).Yet the environmental effect of the project will not essentially alter the original eco-integrity of the evaluated area.The eco-system remains its complete structure and consistent operating process.