A low voltage multi-loop circuit monitoring system is designed,which integrates sensors and nodes for in-spot monitoring and data acquisition,ZigBee and GPRS for data transmission.The acquired data are transferred through ZigBee communication network to data gateway,which can be connected to a portable PC for information storage or processing.The hardware design,software design and parameters setting are described in detail.The system is characterized by real-time monitoring of electrical parameters and switching state for multiple circuits,thus is helpful for diagnosis and solve of possible grid problems.Adoption of ZigBee technology makes the wireless monitoring system scalable,reliable and secure,besides,the numerous sensors and convenience for node add make the system easy to install and quick for deployment.