A charge-discharge management system according to the present disclosure includes a plurality of electric vehicles wherein each electric vehicle has a storage battery, a charge-discharge facility that charges and discharges the storage batteries of the plurality of electric vehicles, and a charge-discharge management device that controls charging and discharging actions of the charge-discharge facility. Each electric vehicle of the plurality of electric vehicles is configured to exchange electricity of the storage battery of the electric vehicle of the plurality of electric vehicles by another electric vehicle through the charge-discharge facility. The charge-discharge management device switches, according to an electricity buying price, a charging action between an action of charging the storage batteries of the plurality of electric vehicles by the charge-discharge facility and an action of charging the storage batteries of the plurality of electric vehicles by exchanging electricity of the storage batteries between the plurality of electric vehicles.