Abstract: This paper proposed an intelligent power quality monitoring system based on 3G technology. The system used ATT7758 and Zigbee wireless communication module to design wireless collection node, and making the collected energy information transmitted via Zigbee wireless network to a centralized device, using 3G technology enables remote monitoring. The results shows that the system can accurately detect power parameters and analysis, realizing the power quality measurement, and It is treal-time, high intelligence.