Concentration estimation device

A concentration degree estimation apparatus, comprising:

• an imaging unit that takes an image of at least one user;
• a sensor that senses room environment information about an environment in a room where the at least one user is present;
• an estimation unit that estimates a concentration degree of the at least one user based on the image of the user taken by the imaging unit and the room environment information sensed by the sensor;
• a control unit that controls a first air-conditioning operation of an air conditioner based on an estimation result of the estimation unit so that the concentration degree of the at least one user increases, the air conditioner targeting the room;
• and
• a model updating unit that recognizes an actual concentration degree of the at least one user from the image taken by the imaging unit after the first air-conditioning operation performed based on the estimation result of the estimation unit, and learns for the estimation model used for estimating the concentration degree based on a recognition result if a desired change in concentration of the at least one user is not recognized from the image.