In recent years, there happened several large earthquakes which have made very serious destruction to local people and society. Among these terrible events' gestation, occurring, and developing, infrasound waves radiated in these processes were often observed. According to the signals received by monitoring sensors, the infrasound sources should be located accurately by an infrasound microphone array. The array was constructed by several sensors of InSAS2008 developed by IACAS, distributed in the North China area. In near future, the sensors will be constructed in all China. Data of signals received by this network could be processed by some methods such as Progressive Multi Channel Correlation (PMCC), sound imaging, rainbow algorithm, etc., to get useful information of nature events. Depending upon this work, some natural events, such as earthquake, debris flow, tsunami, volcanic eruption, etc., could be forecasted under certain conditions, or get more knowledge of them.