Abstract: This article aims at the theory of setting up the three-layer structure under the C/S Model and the characteristic of publishing spatial geographical database on the network (WebG IS),which is mainly based on Map Guide spatial data base jet,analyzing the functions in terface and the mechanism of event response that are embedded in WebG IS.This article suggests the effective technical measures to link the spatial data base and the relative data base,thus offsetting the weakness of MWF's (file format) operation in the Map Guide Viewer plug-in's attribute.The article describes in details the processes of setting up the in tranet structure of basic geographical database under the C/S Model in Qinghai Geological Survey Institute.The success of this technique has widened the sharing of digital geographical data and results with in the Qinghai province and increa ses the reuse value of the results.