随着“计算机就是网络”的想望成为实现，人们希望独立于数据结构和语义等具体条件，跨平台地获取大量信息，GIS互操作是广大用户跨平台获取地理信息的有效途径，因而它成为目前GIS界的研究热点。按照侧重点的不同，将GIS互操作分为技术互操作，服务互操作和语义互操作三类，并分别说明三者的实现方法，关建技术，研究现状和不足之处，最后对GIS互操作的发展方向进行了展望。

With the reality of computer is the network, through the platform, accessing the information, particular geoinformation independent of data structure, semantic and so on is the dream for the users. Inter-operating GIS is the hot topic due to the useful way to realize it. In this paper, we focus on the overview of inter-operating GIS. Technology interoperation is to access and share geodata, service interoperation is to access useful geoprocess and operation, and semantic interoperation works on how to get the true geodata and geoprocess what the user want. Technology, methodology, state and drawback have been present in these four aspects. Finally, the future of inter-operating GIS is expected.