To solve the problems of bulky, high cost and difficult maintenance existing in the electric parameters monitoring system currently, a new electric energy monitoring system is designed. In the system, MAXQ3180 chip can collect the voltage, current, power factor, harmonic and other parameters of the load. Then the relevant data can be collected and sent to AT89S52 microcontroller through SPI bus to saving and manipulating. Meanwhile, to achieve the goal of decentralized control and centralized management, the system can exchange the relevant data with upper computer by CAN bus communication mode. Then the accurate measurement and intelligent management of the electric parameter can be achieved.