An indoor position information storage processing system of an embodiment includes an electric power apparatus, a first transmitter, a first receiver, a position detector, and a first information processing device. The first information processing device processes information based on the distance-measurement waves and a position of the first receiver. The first distance calculation unit calculates a distance between the first transmitter and the first receiver on the basis of distance-measurement waves received by the first receiver. The first position calculation unit calculates a position of the first transmitter on the basis of the calculated distance and a position of the first receiver. The first storage processing unit stores the calculated position of the first transmitter in a storage unit as a position of the electric power apparatus.