Abstract:The water quality automatic monitoring system is based on the internet of things and focused on the B/S model with hybrid database technology and data distribution and sharing technology as the core at Danjiangkou Reservoir Area. It installs several of water quality automatic monitoring instruments, data acquisition and transmission equipments in the proper position of points, lines and plane sources, realizes the real-time 24 h communication by the communication server of monitoring center with various cables or wireless mode. In this way, the water quality instrument as the perception of the node is able to send water quality data to the monitoring center, to achieve water quality monitoring and water distribution, to achieve a variety of information processing and sharing.