Abstract: A power demand and supply control apparatus includes a target value acquiring unit, an information collecting unit, an adjustment amount determining unit, and a communication unit. The acquiring unit acquires a target value of a total adjustment amount. The collecting unit collects information of registered power amount of each of the requesting targets. The determining unit determines an adjustment amount for each of the requesting targets based on the registered power amount of each of the requesting targets and the target value of the total adjustment amount. The communication unit notifies each of the requesting targets of the adjustment amount determined. The information of the registered power amount includes information of an executable time and date. The determining unit extracts a requesting target that has the executable time and date included in the power adjustment execution time and date, and determines the adjustment amount.