An air conditioner comprising: a case having a space formed therein; an inlet and a plurality of outlets facing in different directions of the case; a fan disposed in the case and configured to generate an airflow from the inlet to the plurality of outlets; an airflow direction control unit disposed at the respective outlets and configured to control an airflow direction of air flowing through the respective outlets; a camera directed toward an indoor space; and a controller configured to control the airflow direction control unit based on a plurality of images corresponding to the indoor space and captured by the camera, wherein the controller is configured to: calculate a motion vector for a plurality of pixels constituting an occupant and included in the plurality of images; determine an activity level of an occupant for a plurality of areas (801 - 807) of the indoor space based on the images corresponding to the indoor space, wherein the activity level of the occupant is determined based on a value obtained by dividing a sum of magnitudes of motion vectors for the plurality of pixels, which are calculated for the plurality of images, by a number of the pixels; determine a direction of air discharged from the respective outlets based on the determined activity level; and control the airflow direction control unit according to the direction of the air which is determined for the respective outlets. a case having a space formed therein; an inlet and a plurality of outlets facing in different directions of the case; a fan disposed in the case and configured to generate an airflow from the inlet to the plurality of outlets; an airflow direction control unit disposed at the respective outlets and configured to control an airflow direction of air flowing through the respective outlets; a camera directed toward an indoor space; and a controller configured to control the airflow direction control unit based on a plurality of images corresponding to the indoor space and captured by the camera, wherein the controller is configured to: calculate a motion vector for a plurality of pixels constituting an occupant and included in the plurality of images; determine an activity level of an occupant for a plurality of areas (801 - 807) of the indoor space based on the images corresponding to the indoor space, wherein the activity level of the occupant is determined based on a value obtained by dividing a sum of magnitudes of motion vectors for the plurality of pixels, which are calculated for the plurality of images, by a number of the pixels; determine a direction of air discharged from the respective outlets based on the determined activity level; and control the airflow direction control unit according to the direction of the air which is determined for the respective outlets. calculate a motion vector for a plurality of pixels constituting an occupant and included in the plurality of images; determine an activity level of an occupant for a plurality of areas (801 - 807) of the indoor space based on the images corresponding to the indoor space, wherein the activity level of the occupant is determined based on a value obtained by dividing a sum of magnitudes of motion vectors for the plurality of pixels, which are calculated for the plurality of images, by a number of the pixels; determine a direction of air discharged from the respective outlets based on the determined activity level; and control the airflow direction control unit according to the direction of the air which is determined for the respective outlets.