The invention discloses an electrical energy quality online monitoring platform. The platform comprises an electric energy quality monitoring system, an enterprise service bus, a data exchange platform, a data center, a dispatching technical support system, an electricity utilization information collection system, an operation monitoring center, a production management system and an automatic power supply collection system; the dispatching technical support system, the electricity utilization information collection system, the operation monitoring center, the production management system and the automatic power supply collection system all transmit collected data to the data exchange platform through the enterprise service bus, and the electric energy quality monitoring system reads data out of the data exchange platform through the enterprise service bus, conducts analysis processing on the data obtained through reading and stores the analysis processing result into the data center. By means of the electrical energy quality online monitoring platform, the purpose that data are collected in an integrated and automated mode is achieved.