A distributed electricity storage system (1) includes a plurality of electricity storage apparatuses (110) which are connected to the same distribution line (50), a determination unit (310) that determines excess or deficit in the distribution line (50), an acquisition unit (320) that acquires, with respect to each of the plurality of electricity storage apparatuses, state information indicating a state of an electricity storage apparatus and direction information indicating an operating direction of a charging direction or a discharging direction, and a selection unit (330) that selects an electricity storage apparatus to be controlled in charging and discharging operations from the plurality of electricity storage apparatuses, using a determination result of the excess or deficient power, the state information, and the direction information.