Based on principle of classification, graduation and evaluation on cultivated land and technology of composite geography in formation system （ComGIS） and Unified Modeling Language （UML）, cultivated land classification, graduation and evaluation information system （ALEIS） were designed and implemented. After designing system unitary structure, the process of setting up use-case models by using multil-layer use-case modeling is introduced. Then system analysis, program and testing, system characteristic and direction were presented. The res...
