Abstract: With the development of Internet and the suggestion of digital earth concept,the research on internet-oriented GIS(World Wide Web GIS) becomes a hotspot.Java is one of the best Internet development tools.We developed a little GIS named SLYWGIS with Java,which describes the coal resource information in the area of adjacency of Jiangsu,Shandong,Henan and Anhui provinces.The general way and the steps of development is introduced in this paper.