Disclosed herein is an artificial intelligence server for updating an artificial intelligence model by merging a plurality of pieces of update information including a memory configured to store a first artificial intelligence model, a communication modem configured to communicate with a plurality of artificial intelligence apparatuses, and a processor configured to transmit the first artificial intelligence model to the plurality of artificial intelligence apparatuses, receive, from at least one of the plurality of artificial intelligence apparatuses, first update information of the first artificial intelligence model or second update information of a second artificial intelligence model updated from the first artificial intelligence model, select third update information to be used to update the first artificial intelligence model from the first update information and the second update information, and update the first artificial intelligence model using the third update information.