The invention belongs to the technical field of network voltage control, and particularly relates to a distributed photovoltaic grid-connected stable network voltage control method and a system terminal. The distributed photovoltaic grid-connected stable network voltage control method comprises the following steps: acquiring power quality parameters of a photovoltaic grid-connected point and operation parameters of each set of grid-connected equipment in real time; performing reactive voltage control to adjust a reactive output of a photovoltaic inverter; when an active output of the photovoltaic inverter fails to reach the rated capacity, providing a reactive support for a power grid with the residual power capacity; performing energy storage voltage control, and performing charging and discharging through photovoltaic energy storage to adjust the photovoltaic grid-connected power; and controlling the stored energy to send reactive power for reactive voltage control. The distributed photovoltaic grid-connected stable network voltage control method takes full consideration of the active/reactive adjustable margin of the photovoltaic inverter, makes effective use of photovoltaic stored energy to realize coordinative control, and can further achieve the aims of improving the operation efficiency of the inverter and realizing peak shaving of a power grid load and implement an optimal output and stable network voltage control of a photovoltaic power station.