| With the information-based advancing steps of our country and the rapid development of internet technology, e-government extremely urgent to increase to the work schedule. This article, just according to the current situations and development trends of e-government construction of our country, propose setting up the e-government systematic model based on Web Service, in order to solve doing things in his own way, communicating, repeated construction each other between the e-government system existing at present, difficult to promise information sharing(Especially GIS relevant information) and platform person who share issue, make the e-government affairs built and reach and improve government's working efficiency, lower costs and promoting basic goals, such as economy and social information-based process, etc.The study focal point of this thesis is to lead theory of web service into e-government constructions, probe into how apply web service to GIS and OA and the relevant technological field with the work and apply to the e-government with the form of geospatial information service and Distribute Workflow, try to take the advantage of interoperation of Web service to overcome the system deficiency in using the mode of existing e-government.The main content of the thesis includes: analyzed the intension of the e-government, introduced the progress on theory and technology that the e-government is correlated with and deficiency during actual construction; and then analyzed the technological system characteristic and application of Web service in detail; discussed Concept, using mode anddevelopment trend of Office GIS-and Office GIS supported by Web service, alsoanalyzed the structuring of Examine and Approve of Constructive Land e-government system that probed into and proved because of Web service on the basis of this; The systematic application instance that the article appeared at last - the Examine and Approve of Constructive Land e-Government system of JiangSu Province.
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