On the underground booster and leakage of the city water network pipe,a remote leakage monitoring and locating system based on GSM/GPRS is developed .The parameters of tap water pipe network ,i.e., flow, velocity, direction and pressure are collected by monitor terminal ,the data transmission is realized by GSM/GPRS network .Aiming at the feature of the underground booster and leakage of the water pipe, with the GIS technology and the signal processing methods ,such as negative P wave and flow detecting, accurate and prompt positioning of leakage location can be detected. The system can not only realize the leakage detection of low cost, city area, networking by GPRS network but also provide a emergency platform of tap water pipe network .The system has been used in practical tap water pipe network with excellent results.