A mobile terminal comprising: a display; a communication unit configured to transmit a control signal to a content transmission device; and a controller configured to: in response to an input for an execution of a content playback application, display a content playback setting screen on the display including a plurality of content reception devices (100ba, 100bb) corresponding to a plurality of display devices (180a, 180b), a plurality of input terminals of the content transmission device and a plurality of thumbnail images corresponding to content data input via the respective input terminals of the content transmission device, characterized in that in response to a selection of a first content reception device among the plurality of content reception devices (100ba, 100bb) and a selection of a first input terminal among the plurality of input terminals, transmit first content data received through the first input terminal of the content transmission device to the first content reception device for displaying a first video on a first display device corresponding to first content reception device, and in response to a selection of a second content reception device among the plurality of content reception devices (100ba, 100bb) and a selection of a second input terminal among the plurality of input terminals in state that the first content reception device and the first input terminal are selected, transmit second content data received through the second input terminal of the content transmission device to the second content reception device for displaying a second video on a second display device corresponding to second content reception device. a display; a communication unit configured to transmit a control signal to a content transmission device; and a controller configured to: in response to an input for an execution of a content playback application, display a content playback setting screen on the display including a plurality of content reception devices (100ba, 100bb) corresponding to a plurality of display devices (180a, 180b), a plurality of input terminals of the content transmission device and a plurality of thumbnail images corresponding to content data input via the respective input terminals of the content transmission device, characterized in that in response to a selection of a first content reception device among the plurality of content reception devices (100ba, 100bb) and a selection of a first input terminal among the plurality of input terminals, transmit first content data received through the first input terminal of the content transmission device to the first content reception device for displaying a first video on a first display device corresponding to first content reception device, and in response to a selection of a second content reception device among the plurality of content reception devices (100ba, 100bb) and a selection of a second input terminal among the plurality of input terminals in state that the first content reception device and the first input terminal are selected, transmit second content data received through the second input terminal of the content transmission device to the second content reception device for displaying a second video on a second display device corresponding to second content reception device. in response to an input for an execution of a content playback application, display a content playback setting screen on the display including a plurality of content reception devices (100ba, 100bb) corresponding to a plurality of display devices (180a, 180b), a plurality of input terminals of the content transmission device and a plurality of thumbnail images corresponding to content data input via the respective input terminals of the content transmission device, characterized in that in response to a selection of a first content reception device among the plurality of content reception devices (100ba, 100bb) and a selection of a first input terminal among the plurality of input terminals, transmit first content data received through the first input terminal of the content transmission device to the first content reception device for displaying a first video on a first display device corresponding to first content reception device, and in response to a selection of a second content reception device among the plurality of content reception devices (100ba, 100bb) and a selection of a second input terminal among the plurality of input terminals in state that the first content reception device and the first input terminal are selected, transmit second content data received through the second input terminal of the content transmission device to the second content reception device for displaying a second video on a second display device corresponding to second content reception device.