A data acquiring unit (122) acquires external factor data such as day of the week, date and time, or weather together with electric power data in a house, and stores the data in a storage unit (114). A classification/learning unit (124) reads the electric power data and the external factor data stored in the storage unit (114), and classifies/learns the read data. A scheduling unit (126) predicts a house power demand on the basis of the classified/learned data, and plans the charge/discharge of a vehicle according to the result of prediction. A command generating/outputting unit (128) generates a charge/discharge command of the vehicle according to the charge/discharge schedule.