A mobile terminal comprising: a display configured to display one or more windows; a controller configured to: display a first window on which a first application is executed to occupy an entire screen of the display; display an indicator to be dragged at the first window; display a list of applications that can be executable on the mobile terminal; receive selection of an application from the list of applications to execute the second application (Appl); and divide the entire screen into two separate areas including a first display area and a second display area to display the first window and a second window; and resize the first window displaying the first application to be reduced and display the second window displaying the second application with the reduced first window, characterized in that the controller further configured to: detect a drag input for dragging from the first window to the second window; and when the first window and the second window are simultaneously displayed; and input information related to the first application to the second application to be processed by the second application when the touch input for dragging is detected; and process the input information by the second application to perform a certain function according to the second application, wherein the input information related to the first application that is displayed on the first display area is displayed on the second display area of the second application when the drag input is input. a display configured to display one or more windows; a controller configured to: display a first window on which a first application is executed to occupy an entire screen of the display; display an indicator to be dragged at the first window; display a list of applications that can be executable on the mobile terminal; receive selection of an application from the list of applications to execute the second application (Appl); and divide the entire screen into two separate areas including a first display area and a second display area to display the first window and a second window; and resize the first window displaying the first application to be reduced and display the second window displaying the second application with the reduced first window, characterized in that the controller further configured to: detect a drag input for dragging from the first window to the second window; and when the first window and the second window are simultaneously displayed; and input information related to the first application to the second application to be processed by the second application when the touch input for dragging is detected; and process the input information by the second application to perform a certain function according to the second application, wherein the input information related to the first application that is displayed on the first display area is displayed on the second display area of the second application when the drag input is input. display a first window on which a first application is executed to occupy an entire screen of the display; display an indicator to be dragged at the first window; display a list of applications that can be executable on the mobile terminal; receive selection of an application from the list of applications to execute the second application (Appl); and divide the entire screen into two separate areas including a first display area and a second display area to display the first window and a second window; and resize the first window displaying the first application to be reduced and display the second window displaying the second application with the reduced first window, characterized in that the controller further configured to: detect a drag input for dragging from the first window to the second window; and when the first window and the second window are simultaneously displayed; and input information related to the first application to the second application to be processed by the second application when the touch input for dragging is detected; and process the input information by the second application to perform a certain function according to the second application, wherein the input information related to the first application that is displayed on the first display area is displayed on the second display area of the second application when the drag input is input. detect a drag input for dragging from the first window to the second window; and when the first window and the second window are simultaneously displayed; and input information related to the first application to the second application to be processed by the second application when the touch input for dragging is detected; and process the input information by the second application to perform a certain function according to the second application, wherein the input information related to the first application that is displayed on the first display area is displayed on the second display area of the second application when the drag input is input.