Improper acquisition of position information is prevented in a system in which points are added according to a movement distance of a user owning a cellular phone terminal. Position information of a cellular phone and the time information corresponding thereto are acquired on the basis of GPS or base station information. The movement distance and movement speed are calculated for each predetermined time interval, and whether or not the movement is within a range allowed for the corresponding transportation mode is determined on the basis of these position information and movement speed with reference to the mobile body database where timetables or the like have been recorded. The acquisition of the position information is determined to be improper when the movement is not in the range allowed for any of the transportation modes.