An artificial intelligence device may receive first voice data corresponding to first voice uttered by a user from a first peripheral device, acquire a first intention corresponding to the first voice data, transmit a first search result corresponding to the first intention to the first peripheral device, receive second voice data corresponding to second voice uttered by the user from a second peripheral device, acquire a second intention corresponding to the received second voice data, and transmit a search result corresponding to the second intention to the second peripheral device depending on whether the second intention is an interactive intention associated with the first intention.