According to the problems of lacking of systematic and regul ar research in the development of GIS , this paper analyzed the social background , technology background and subject background in which GIS was produced and developed and explored changes of GIS architecture and software development model caused by the development of computer communication Web technology . It considered that the idea of Open GIS and Com GIS , which were distributed , was more fit for both data service and functional service under Web( Grid) environment , and put forward that GIS was developing into Open GIS based on Web services and Grid services . It also discussed the basic architecture and characteristics of sharing geographic information and data interaction based on Web services . At last , it proposed that Grid services provided a new opportunity and a new technology way to share geographic information and solve problems together , and underlined that the core of Web services and Grid services was services that both related and differentiated to each other .