A distributed inverter power quality monitoring system based on LabVIEW is designed to monitor the power quality of multiple inverters, which applies the virtual instrument technology and Ethernet communication. And combining with the data acquisition card, this system is able to acquire inverter power signals in real-time and send the these signals to remote monitoring system by the Ethernet communication protocol UDP. Based on the data received, the remote system analyzes the power quality indexes such as frequency, power, three-phase unbalance factor and harmonic content. The received data and calculation results will be stored, classified and shared through database, which establishes a solid foundation for the further analysis of power quality.