Abstract: A municipal network system is an important part of a city's geographic information system. Based on the GIS platform—ArcGIS and applying the technology of middleware—Catalog and Geodatabase, the authors design the Shiyan City gas-pipe database. At the same time, the authors integrate the RGBMS outside the GIS and the gas-pipe DMS on a platform that is based on the visual management of GIS spatial data, and successfully realize the unified management of geometric relational data, logic relational data and dynamically-inspected data. The geometric topology relation of the municipal pipe-network spatial data was established using the feature class and the feature dataset of the pipe-line, and the logic topology rule was established using Catalog and the Geodatabase. It can represent exactly all kinds of linked relations held by the industrial pipe's physical network and dynamic flow system. Supported by the data interface of real-time inspection and by the system of SKADA and RTU, the physical feature data of the hydro-data of the pipeline can be obtained. It provides the dynamic and inspected spatial information for the DMS that is offered for gas control and accident forecast. Based on the frame of C/S and B/S, the system is integrated and holds practical application values.