Considering the demand of urban and rural planning and the characteristics of spatial information technology (SIT), the
study focuses on the application of SIT to support multi-scale urban planning. Three scales of urban and rural planning,
such as city and town system planning, urban master planning, and detailed urban planning, were studied based on SIT.
Firstly, tacking Great Beijing Region as an example, which includes Beijing, Tianjin, and northern of Hebei province,
the city and town system planning was studied, supported by the theory of spatial interaction between cities and towns,
and GIS spatial analysis. Then, for the urban master planning of Beijing, the RS and GIS were applied to do the spatial
development analysis based on RS image data and GIS spatial analysis. Regarding to the conservation planning of
Beijing's Inner city, the third scale is detailed urban planning. RS, GIS, and VR were integrated to determine the
conservation region and digital conservation way as well. Finally, three conclusions were worked out.