In order to ensure the safe operation of power grid, external power supply reliability and the various types of electrical work in an orderly manner, it is necessary to monitor the various parameters of transmission line realtime. This paper introduces a wireless monitoring system of high accuracy threephase electric energy measurement based on chip ATT7022C, using STC90C58AD as CPU, communicating with kingview monitoring interface by CC2530 ZigBee wireless network. That can real time monitor the current, voltage power, and other electric parameters in transmission line and make corresponding treatment such as reactive power compensation or disconnect the transmission lines. The intelligent monitoring system is integration of the measurement and control technology, wireless communication technology and modern electronic technology. It has good realtime performance, low power consumption, high accuracy and other characteristics. It can meet the eletric power system for monitoring the power parameter.