A medical apparatus includes an apparatus main body (11) configured to execute imaging or treatment of an object in accordance with an imaging plan or a treatment plan, an electric power calculation unit (29) configured to calculate an electric power required for the imaging or the treatment based on the imaging plan or the treatment plan, a communication unit (23) configured to receive power information from a plurality of other medical apparatuses, a total electric power calculation unit (30) configured to calculate a total electric power from the calculated electric power and the received electric power, a comparing unit (31) configured to compare the calculated total electric power with a threshold, and a display (25) configured to display a comparison result obtained by the comparing unit.