An artificial intelligence device according to an embodiment of the present invention may include a microphone configured to receive voice; a sound output unit configured to output sound; an artificial intelligence unit configured to acquire context information of a target, based on at least one of an image received from a camera disposed outside and a voice received from the microphone, generate feedback information according to the acquired context information, and determine output volume intensity of the generated feedback information; and a controller configured to control the sound output unit to output the feedback information at the determined output volume intensity.