By use of the GIS and RS technologies,selecting the Urban Ministry of suburb in Xi'an city as research area,and adopting the integrations of RS images indoor interpretation and outdoor investigation and indoor computer aided cartography,this paper built the spatial database of urban biotopes in research area based on GIS according to the classification system of urban biotopes.On the basis of this database,the paper carried out the research on the spatial pattern of urban biotopes,by calculating the below-mentioned five indexes of urban biotopes:average areas,shape index,fractal dimension,stability index,Moran I index.The results indicate that the quantities of main types blocks is in direct proportion to the total areas of them according to urban biotopes,both shape index and fractal dimension are provided with positive correlativity,so do both stability index and Moran I index.