A wearable device includes； a near field communication module； a position sensor module 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 having various kinds of sensors that detect moving body information； a storage unit 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 for every given time； a unit that calculates positional data on the basis of the Raw data； aid 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.
