This paper analyzes the necessity of the application of WebGIS in CATV basic network. There was almost no research in using WebGIS to manage CATV basic network data in China. This paper briefly introduces how to construct an integrated transaction management system of CATV basic network based on WebGIS, and it forms a database of pivotal points, lines and buildings. CATV basic network based on WebGIS has very great superiority to traditional GIS, anybody can visit the system in anyplace by wired or wireless connection. Therefore it can satisfy the managers who want to query information about network, equipment and customers or response on. In this way the routine network and equipment maintenance becomes easily and fleetly. But WebGIS also has bottle-necks such as vector graphic editing. The editing of vector graphic and attribute play important roles in GIS, especially in CATV basic network management, because equipment, cable and fiber-optic change frequently. This paper develops Zhejiang Jiangshan broadcasting and TV station geographic information system on the basis of ArcIMS platform, and making use of the capability of reading and writing spatial data of ArcSDE to solve vector graphic editing problem.