An image display device (200, 202), which is mounted on a vehicle, comprising: a display unit configured to output an image; a communication unit configured to transceive data with an external mobile terminal; and a controller configured to: - set mode information whether to use Virtual Networking Computing, VNC, mode or a notification user interface for displaying a screen of an event, - transmit the set mode information to the mobile terminal, - if the mode information is set to use the notification user interface, control the communication unit to receive, from the mobile terminal, a notification corresponding to an event information of an application installed at the mobile terminal, wherein the notification comprises an identification information of the application and an identification information of at least one user action provided by the application, - if the mode information is set to use the VNC mode, control the communication unit to receive, from the mobile terminal, screen information corresponding to the event information from the mobile terminal, - control the display unit to output the screen of the event based on the received notification or the received screen information, - receive an input of selecting a user action among the at least one user action via the screen of the event and - transmit the identification information of the selected user action to the mobile terminal. a display unit configured to output an image; a communication unit configured to transceive data with an external mobile terminal; and a controller configured to: - set mode information whether to use Virtual Networking Computing, VNC, mode or a notification user interface for displaying a screen of an event, - transmit the set mode information to the mobile terminal, - if the mode information is set to use the notification user interface, control the communication unit to receive, from the mobile terminal, a notification corresponding to an event information of an application installed at the mobile terminal, wherein the notification comprises an identification information of the application and an identification information of at least one user action provided by the application, - if the mode information is set to use the VNC mode, control the communication unit to receive, from the mobile terminal, screen information corresponding to the event information from the mobile terminal, - control the display unit to output the screen of the event based on the received notification or the received screen information, - receive an input of selecting a user action among the at least one user action via the screen of the event and - transmit the identification information of the selected user action to the mobile terminal. - set mode information whether to use Virtual Networking Computing, VNC, mode or a notification user interface for displaying a screen of an event, - transmit the set mode information to the mobile terminal, - if the mode information is set to use the notification user interface, control the communication unit to receive, from the mobile terminal, a notification corresponding to an event information of an application installed at the mobile terminal, wherein the notification comprises an identification information of the application and an identification information of at least one user action provided by the application, - if the mode information is set to use the VNC mode, control the communication unit to receive, from the mobile terminal, screen information corresponding to the event information from the mobile terminal, - control the display unit to output the screen of the event based on the received notification or the received screen information, - receive an input of selecting a user action among the at least one user action via the screen of the event and - transmit the identification information of the selected user action to the mobile terminal.