The invention particularly relates to a transformer area power quality optimization device. The device comprises an active part, a passive part, a control module and a mutual inductor, the active partcomprises a static var generator SVG, the passive part comprises a static var compensator SVC, the mutual inductor is installed between a three-phase power grid and a load, and the signal output endof the mutual inductor is connected with the control module through an analog signal conditioning circuit. The device is characterized in that the control module comprises a DSP microprocessor and a field programmable gate array (FPGA) chip; the FPGA chip transmits collected voltage and current signals to the DSP microprocessor; and the DSP microprocessor judges the state of the circuit through calculation. Aiming at the corresponding electric energy quality problem of the circuit, a corresponding passive part is firstly input for treatment, and then the input of the active part is controlledto realize compensation. According to the method, passive compensation and active compensation are combined, passive compensation is mainly adopted, active compensation is fine compensation, and the compensation cost is greatly reduced.