A technology has been conventionally known that reduces the amount of energy consumption of a service side by altering a service timetable so as not to exceed a certain amount of electric power that is under contract with an electric power company. In such a technology, for the purpose of energy saving of a whole of a railroad system including station facilities, the energy saving of a station side may also be performed, in addition to the energy saving on the service side. In this case, it is common that the energy saving on the service side and the energy saving on the station side are performed independently from each other.
In such a technology described above, for an example, it is desirable that the energy saving on the service side and the energy saving on the station side be able to be performed in a unified manner.