In addition to a dissociation ratio being calculated with a load pattern recognition unit 3 based on sample data of the amount of electrical power in an electrical power load accumulated in a sample data accumulation unit 2, adjusted electrical power and a target coefficient are calculated with an adjusted electrical power arithmetic processing unit 5 and a target coefficient arithmetic processing unit 7. In addition, a demand period target value arithmetic processing unit 8 calculates a target value of the amount of electrical power used by an electrical power load for each demand period based on the dissociation ratio, adjusted electrical power and target coefficient. The amount of electrical power used by the electrical power load is then controlled by a demand control unit 9 and load control unit 10 based on this target value. |