Power quality optimization and management device and power saving method

The invention discloses a power quality optimization and management device and a power saving method. The device comprises a CPU controller, a current and voltage sampling mutual inductor, an electricreactor and a capacitance compensator, wherein the input end of the CPU controller is connected with the current and voltage sampling mutual inductor, the output end of the CPU controller is connected with a silicon controlled rectifier switching device, and the silicon controlled rectifier switching device is sequentially connected with the electric reactor and the capacitance compensator in series. The device and the method have the beneficial effects that surge and transient of a power grid are inhibited, the voltage is adjusted, and finally the phase is compensated, so that the heating power of electric equipment can be effectively reduced, the electric energy is saved by 15%-25%, the electric equipment can be protected, the equipment is prevented from being burnt due to unstable electric power, and the servi