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With the promotion of e-government application system, the important effect of data exchange brings more and more concern and discussion. This paper proposes the data exchange system model which is composed of the data transmission services, data exchange adapter and task processors, aiming at data sharing and automatic data exchange application of GIS and other non-spatial data. We introduce XML as a logistic expression and intermediate data standard format of spatial data to make it have the capability of heterogeneous GIS which shares the data resources and services crossing platforms. The data engine model as the transaction processing center between GIS and other non-spatial data uses workflow management technology definite complex analysis model and business process and makes drive-algorithm design and implementation for different data types.