An image display device comprising: a display; an interface adapted to exchange data with a mobile terminal; and a controller adapted to: - perform pairing with the mobile terminal, - control the display to display an application list related to the paired mobile terminal after pairing with the mobile terminal is completed, wherein the application list includes at least one application item corresponding to at least one mirroring application preset in the image display device as an application to be subjected to mirroring among applications installed in the mobile terminal, - when a first application item among the at least one application item in the application list related to the paired mobile terminal is selected, transmit a request for execution of a first application corresponding to the first application item and a request for transmission of a screen related to the first application to the mobile terminal, and - control the display to display a screen window related to the first application based on information received from the mobile terminal, wherein the information corresponds to the first application which is being executed in the paired mobile terminal. a display; an interface adapted to exchange data with a mobile terminal; and a controller adapted to: - perform pairing with the mobile terminal, - control the display to display an application list related to the paired mobile terminal after pairing with the mobile terminal is completed, wherein the application list includes at least one application item corresponding to at least one mirroring application preset in the image display device as an application to be subjected to mirroring among applications installed in the mobile terminal, - when a first application item among the at least one application item in the application list related to the paired mobile terminal is selected, transmit a request for execution of a first application corresponding to the first application item and a request for transmission of a screen related to the first application to the mobile terminal, and - control the display to display a screen window related to the first application based on information received from the mobile terminal, wherein the information corresponds to the first application which is being executed in the paired mobile terminal. - perform pairing with the mobile terminal, - control the display to display an application list related to the paired mobile terminal after pairing with the mobile terminal is completed, wherein the application list includes at least one application item corresponding to at least one mirroring application preset in the image display device as an application to be subjected to mirroring among applications installed in the mobile terminal, - when a first application item among the at least one application item in the application list related to the paired mobile terminal is selected, transmit a request for execution of a first application corresponding to the first application item and a request for transmission of a screen related to the first application to the mobile terminal, and - control the display to display a screen window related to the first application based on information received from the mobile terminal, wherein the information corresponds to the first application which is being executed in the paired mobile terminal.