Urban water supply pipe network system is a huge and complicated underground project. Water supply pipe network is buried deep underground for a long time, with wide distribution, complex structure and various materials. The water supply pipe network serves as the lifeblood of a city. In recent years, the problems of water supply network such as dispatching, leakage and control become more and more prominent, leading to the increasing demand for water supply network management and maintenance. The late start of infrastructure construction has greatly increased the difficulty of viewing and processing pipe network information, so that the traditional manual management mode is difficult to meet the demand. In response to the issues existing in the urban water supply pipe network, we developed GIS mobile terminal system of water supply pipe network based on database technology, GIS technology and ArcGIS technology. Using the Android mobile terminal as the platform, we employ modern terminal GPS positioning system technology and 5G network communication interaction to build an efficient, reasonable and practical GIS system of water supply network. The mobile terminal system enhances the operational and supervisory capabilities of the water supply pipe network, realizes the intelligent operation of urban water supply pipe network, and improves the level of water supply pipe network management and service. The system is mainly composed of four modules, basic map operation module, map display setting module, pipe network analysis module and route navigation module. The basic map operation module links various functions through the click function to analyze distance, area and other data for users. The map display setting module uses the layer control function and GIS technology to clearly display the layers and data required by the user. The functions of the pipe network analysis module provide users with pipe network management measures. The route navigation module uses GIS positioning function to provide navigation routes for users. All four modules utilize pipe network data for statistical analysis. Users can operate the four modules on the Android mobile client platform to make the dense water supply network clearly visible. Leveraging the portable and convenient features of the mobile terminal system, relevant government departments can promptly identify accidents, coordinate personnel quickly, and formulate and implement emergency plans