A display device according to an embodiment of the present disclosure includes an output unit, a communication unit configured to perform communication with an artificial intelligence server, and a control unit configured to receive a voice command, convert the received voice command into text data, determine whether the converted text data is composed of a plurality of languages, when the text data is composed of the plurality of languages, determine a language for a voice recognition service among the plurality of languages based on the text data, and output an intent analysis result of the voice command in the determined language.