Provided are a motion evaluation system, a motion evaluation device, and a motion evaluation method that are capable of efficiently transmitting information suitable for motion improvement to a person in motion. In the motion evaluation system, as a configuration including a sensor unit, an information processing device, and an information presentation device, the information processing device is configured to include a communication device, a storage device, and an arithmetic device. The arithmetic device acquires, via the communication device, action data obtained by observing the user by the sensor, compares the action data with information relating to the suitability of the action, determines the state of the action of the user, specifies, as an improvement point, determines a busy degree by comparing operation data after the operation of the improvement point with information relating to the busy degree of the user, and outputs information having different contents multiple times to the information presentation device as information relating to an improvement instruction relating to the improvement point on the basis of a rule predetermined in accordance with each of the conditions of the improvement point and the busy degree.
Motion Evaluation System, Motion Evaluation Device, and Motion Evaluation Method