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The paper discusses the basic principles and the problem solutions during the design and implementation of the mobile GIS system,and base on the research result,we developed the General Provincial Situation Visualization System Based on iOS of Shandong Province.The system is developed in the Objective-C programming language,and use the ArcGIS Runtime SDK for IOS as the development tool to call the ‘World-map Shandong services to implement the development of the General Provincial Situation Visualization System Based on iOS devices.The system is currently available for download in the Appstore and is chosen as the typical application case of ESRI China ArcGIS API for iOS.