A management server includes: a reception section that receives, from a second user terminal, a rental request for use of a battery; and an incentive management section that, when a first battery or a second battery is rented to a second user, gives an incentive, according to return of the battery from the second user, wherein the incentive management section gives a first incentive to the second user when the second user returns the first battery to a first user, and gives a second incentive to the second user when the second user returns the second battery to the first user or when the second user returns the first battery to a place of return that is different from the first user, and the first incentive is an incentive having a higher value than the second incentive.