The invention discloses an electric energy quality treatment method based on an AC/DC hybrid power supply network. A single-phase inverter is connected to a three-phase power grid, thereby causing three-voltage imbalance and load nonlinearity or too high reactive power demands. The three-voltage imbalance and load nonlinearity or too high reactive power demands cause voltage drop fluctuation, thereby enabling a power grid to be in an asymmetric operation state. The method employs a mode of AC/DC hybrid power supply. When a system is in the asymmetric operation state, the voltage imbalance phase can be detected through a coordination controller, and a part of active power of a distributed power supply connected with the coordination detector is consumed and transferred through a DC network, thereby achieving three-phase balance, and inhibiting the generation of the asymmetric operation state. When local voltage drop happens to a system, the current reactive vacancy and negative sequence current can be calculated through the coordination controller. The single-phase inverter generates reactive power in the same quantity according to the compensation capacity, thereby achieving the local compensation of the reactive power. Moreover, the method is high in response speed, avoids the long-distance transmission of reactive power, and reduces the consumption of electric energy.