A plurality of transportation vehicles travel with power from an energy storage member along a predetermined travel route under control of a ground controller. A charging area having charging equipment for charging the energy storage member of the transportation vehicle is provided in the travel route, and the transportation vehicles report a position and remaining capacity of the energy storage member to the ground controller. The ground controller controls a transportation vehicle having remaining capacity of a threshold value or less to travel to the charging area for charging the energy storage member, and controls transportation vehicles in the charging area to travel to positions outside the charging area in accordance with transportation requests.