Through analysis of present situation of Informational Construction in Urban Environmental Protection Bureaus of China

the Urban Environmental Protection Information System based on ComGIS is designed in this paper.Key technologies such as data organization and functionality designation are studied

and development environment and integration technology are analyzed.Through analyzing the characteristics of environmental management of Yangzhou city

and establishing urban environmental geo-spatial data base and attribute data base

Yangzhou Environmental Protection Information System was developed based on comGIS

including Fundamental Map module

Accessing Data module

Geometry Object module

Output module

etc

as well as Fundamental Platform for Information sharing and Pollution Managing Subsystem.It realized visualization in managing information about environmental protection

and provided scientific supports for Yangzhou environmental management.