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 .