In the present invention, a power monitoring unit (330) estimates the integral power consumption on the basis of an obtained actual value or amount of change of power consumption. When the estimated value for the integral power consumption as estimated by the power monitoring unit (330) reaches a prescribed amount of power, a presentation unit (204) presents a warning, on the basis of the power values obtained by a load power meter (340), indicating a list of loads for which the power consumption should be controlled.