Noise recorder is a product designed for online monitoring and positioning of leakage points in water supply network. Wireless communication transmission supports 2G, 3G and 4G network system to achieve remote transmission function. The data can be transmitted to the Wb server, and users can log in the "Online Monitoring System of Water Supply Network" on the device installed with a browser, such as a mobile phone, tablet or computer, to view the sound information collected by the sensor, so as to see and listen to the recorded noise, achieve human-intelligence integration, and more accurately locate the leak point.