A display device comprising: a communication interface configured to communicate with a user terminal device; a display; a memory configured to store at least one instruction; and a processor configured to execute the at least one instruction to: in response to detecting of a content request event associated with a request for the display device to output information associated with content that is being output via the user terminal device, receive the information associated with the content from the user terminal device via the communication interface; based on the type of content that is being output via the user terminal device being video content, control the display to display the video content based on information associated with the video content that is received from the user terminal device; and based on the type of content that is being output via the user terminal device being audio content, control the display to display an audio user interface that is different than a UI that is concurrently being displayed via the user terminal device, and control the display device to output the audio content, based on information associated with the audio content that is received from the user terminal device; wherein the processor is further configured to execute the at least on instruction to: based on the user terminal device being moved within communicative proximity of a NFC tag of the display device in a state in which a connection between the display device and the user terminal device is established, the connection between the display device and the user terminal device is ended. a communication interface configured to communicate with a user terminal device; a display; a memory configured to store at least one instruction; and a processor configured to execute the at least one instruction to: in response to detecting of a content request event associated with a request for the display device to output information associated with content that is being output via the user terminal device, receive the information associated with the content from the user terminal device via the communication interface; based on the type of content that is being output via the user terminal device being video content, control the display to display the video content based on information associated with the video content that is received from the user terminal device; and based on the type of content that is being output via the user terminal device being audio content, control the display to display an audio user interface that is different than a UI that is concurrently being displayed via the user terminal device, and control the display device to output the audio content, based on information associated with the audio content that is received from the user terminal device; wherein the processor is further configured to execute the at least on instruction to: based on the user terminal device being moved within communicative proximity of a NFC tag of the display device in a state in which a connection between the display device and the user terminal device is established, the connection between the display device and the user terminal device is ended. in response to detecting of a content request event associated with a request for the display device to output information associated with content that is being output via the user terminal device, receive the information associated with the content from the user terminal device via the communication interface; based on the type of content that is being output via the user terminal device being video content, control the display to display the video content based on information associated with the video content that is received from the user terminal device; and based on the type of content that is being output via the user terminal device being audio content, control the display to display an audio user interface that is different than a UI that is concurrently being displayed via the user terminal device, and control the display device to output the audio content, based on information associated with the audio content that is received from the user terminal device; wherein the processor is further configured to execute the at least on instruction to: based on the user terminal device being moved within communicative proximity of a NFC tag of the display device in a state in which a connection between the display device and the user terminal device is established, the connection between the display device and the user terminal device is ended.