A wearable device 1 includes: a near field communication module 11； a position sensor module 15 that extracts Raw data used for determining positional data, from GNSS data from GNSS satellites； an internal timer that outputs system time after output timing of positional data synchronized with the Raw data； sensor modules 16, 17, 18 having various kinds of sensors that detect moving body information； a storage unit 131 that stores therein detection data from the various kinds of sensors； a unit that stores the detection data from the various kinds of sensors in the storage unit 131 for every given time； a unit that calculates positional data on the basis of the Raw data； and a unit that creates moving body information so that the system time and the positional data are associated with detection data stored in a memory area, and transmits the moving body information to a display device 2.
