As we know the gas pipeline laying is very extensive in city, but for deep buried gas pipeline monitoring has low accuracy, positioning is not accurate and can not be realized fully remote monitoring and other issues. This paper uses negative pressure wave correction algorithm for pipeline leakage efficiently and accurately positioning. System using Daubechies wave wavelet base, using the modified Mallat fast wavelet algorithm for signal noise reduction, improve the system for detecting leakage sensitivity, increased leakage localization accuracy. On this basis, system integration of the wireless communication technology ( GSM ), PLC technology, bus technology, CLinux server and embedded WEB technology and GPS technology, to achieve a natural gas pipeline for remote monitoring, data analysis and processing function.