An energy management controller (2) obtains measurement data pertaining to power values measured by a plurality of devices (4, 5) for each of a plurality of power lines (D1-D4) in a demand area, from each of devices (4, 5). When there are a plurality of power values measured for a single power line, the energy management controller (2) selects one power value as the power value measured for the power line, on the basis of a priority order assigned to devices (4, 5) in advance. The energy management controller (2) manages the power consumed in the demand area by using the power value measured in each power line. In addition, the energy management controller (2) displays information indicating the power value measured for each power line on an operation terminal (3) in a pre-set mode.