Abstract: According to the characteristics of urban land classification and evaluation and Geographic information System,this paper applies GIS to the field of urban land classification and evaluation.On the basis of analysing the current methods of urban land classification and evaluation,the author develops the basic methods and steps of urban land classification and evaluation based on GIS,and designs software of urban land classification nad evaluation based on ArcCAD,the software can automatically completes calculating factor score,determining land.class,calculating base price,outputing results and ect.