The invention provides a photovoltaic AGC (Automatic Gain Control) and AVC (Automatic Volume Control) control method and system based on fuzzy control. The photovoltaic AGC and AVC control method comprises the following steps: establishing a fuzzy control coefficient database by combining an active power preferential regulation method with a fuzzy control method and regulating; calculating an optimal working region of a feed line lower inverter; distributing active power/reactive power of the feed line lower inverter according to the optimal working region of the inverter. According to the photovoltaic AGC and AVC control method, influences on voltage caused by active power are revised by adopting the active power preferential regulation method; an active power-voltage correction coefficient is revised by utilizing a fuzzy partitioning theory, so that the stability of the active power and the voltage of an electric field is easy to improve; inner loss of a photovoltaic power station is reduced, and active power/voltage control of the inverter is considered to realize the aim that the inner network loss of the photovoltaic power station is minimum; the loss of the electric field is reduced and the utilization rate of electric energy is improved; a concept that working points of the optimal working region of the inverter of the photovoltaic power station are counted is introduced, and the inverter can work in the optimal working region on the basis of guaranteeing the stability of the electric field as much as possible.