A wireless water environmental monitoring system based on ZigBee technology was designed in this paper, which was composed of water quality monitoring node of multi-source information fusion, router node, gateway and upper computer monitoring software. The system introduced the node information collection mechanism of diversification, providing effective wireless network coverage and reliable data transmission for water environment, including the parameter of dissolved oxygen, pH and temperature. Experimental results showed that the wireless monitoring node could work for more than 1 231 days under the condition of sampling once per hour and supplying 1 200 mA?h capacity battery so as to meet the long-term automatic monitoring requirements of water environment. The wireless monitoring system has the advantage of low power consumption, simple deployment, flexible networking, which is suitable for the long term monitoring of water quality of small river, medium-sized area of lakes and ponds.