In a system, a motion estimating unit is configured to output supervising reference position values of the plurality of regions of the body of a person or the like at a correct answer reference time at which a time difference from a measurement time is the same as a time difference between the reference time and the estimation time based on learning sensor-measured values over the first time length before the measurement time of the learning sensor-measured values using the learning sensor-measured values measured while the person or the like is performing a predetermined motion by learning according to an algorithm of a machine learning model and the supervising reference position values of the plurality of regions of a person or the like at the time of measurement thereof.
