Server and method for adjusting power supply and demand

The invention provides a server and a method for adjusting power supply and demand. A server for adjusting the demand or supply of power is provided with: a memory in which data pertaining to a plurality of chargers configured so as to charge or discharge power to a vehicle in which a power storage device is mounted is stored; and a processor configured to transmit a message to a user of the vehicle when the vehicle travels toward the destination, the message being a message suggesting charging or discharging of the vehicle using at least one of the plurality of chargers. The processor is configured to: acquire, with respect to each of the plurality of chargers, power supply/demand information relating to the demand or supply of power in a power grid in a region where the charger is installed; extracting, from among the plurality of chargers, a charger provided in a region where the demand or supply of power is greater than that of other regions, on the basis of predetermined information including power suppl