Server And Control Method Thereof

A server may include a transceiver configured to communicate with a charger, and a controller configured to determine, based on state information of a vehicle, a required state of charge (SoC), control, based on charging and discharging from an SoC of the vehicle to the required SoC and electricity charging costs over periods, the charger to increase (e.g., maximize) an expected profit, and while controlling the charger, adjust the electricity charging costs over the periods so that a first electricity charging cost at a start time of a first period of the periods is lower than a constant electricity charging cost over the first period, and the first electricity charging cost is gradually (e.g., linearly) increased over the first period.