A method for sharing data with a mobile terminal in an image display device, the method can include receiving a broadcast signal including audio and video data, connecting to the mobile terminal via an wireless network interface, controlling the wireless network interface to transmit data to the mobile terminal wirelessly connected to the image display device, controlling the wireless network interface to receive screen information from the mobile terminal wirelessly connected to the image display device and displaying a mirroring image based on the screen information received from the mobile terminal in a first region with displaying the video data included in the broadcast signal in a second region, in which the mirroring image corresponds to a current screen displayed on the mobile terminal.