Provided are a motion recognition apparatus, a motion recognition system and a motion recognition method that enable ‘event motions’ to be recognized with a small number of calculations. The motion recognition system, which recognizes user motions by using sensor data, is configured to be provided with: a cyclical loss detection means for detecting cyclical losses of sensor data when a user is moving and a recognition processing means for setting data intervals to be used for recognizing motions in accordance with the cyclical losses of sensor data that were detected, and for recognizing user motions on the basis of sensor data for the data intervals that have been set.
