With the development and perfection of GIS (Geographical Information System), its developing tools have been getting riper day by day. Complying with this trend, MapInfo Company has developed MapInfo and MapX control, which can realize the design of complicated GIS system. The paper is based on Guilin planning maps. Firstly, we use MapInfo 9.5 to structure map data and build Geoset file through Geoset Manager. Then, we carry out the secondary development to MapX control under Visual Studio 2008 programming environment and by C# programming language. Finally, the electronic map of Guilin is implemented.