网络地理信息系统（Web GIS)是当前GIS的技术热点。从分析计算模式的进化过程出发，指出了基于Web的分布式计算环境，使传统GIS有望实现开放目标，以满足数据共享与互操作需求，进而综述了Web GIS概念，包括网络协议的GIS拓展、Web GIS新型数据模型、相关算法、多源数据集成以及网络优化模式（分布式并行处理），最后通过自行开发的Web GIS浏览器（Java Applet)具体予以实现。

Web GIS is current GIS developing hotspot, the article beginning with analyzing the computing evolution process, points out that the Web distributed environment is the right way to make the traditional GIS industry reach the opening ideal, further step the paper summarizes the conception,characteristics, types and framework of Web GIS,try to bring forward the best plan to publish spatial data on network by analyzing and comparing the realizing methods(CGI,Plug-ins,Java),including network protocol extend ,new data model and its algorithm, complex data integration, and network optimizing method(distributed parallel computing), at last realizes it by a Web GIS browser (Java applet) programming case.