An input device adapted to perform a document editing job to generate a pattern image by touch input of the input device on a touch screen of a display apparatus , wherein the display apparatus is adapted to store coordinate values belonging to sections of the generated pattern image that are detected from a point of the touch screen of the display apparatus that is touched by the input device in relation to the pattern image, the input device comprising: a communicator configured to communicate with the display apparatus ; a sensor configured to sense a sound (S1110); a volume extractor configured to extract volume sections from the sensed sound (S1120); and characterized by a controller configured to generate a first event signal to cancel a job by a preset first section based on one of the coordinate values last stored in the display apparatus in relation to the pattern image displayed on the display apparatus if a time at which a volume section exceeding a preset threshold level is maintained is less than or equal to a preset threshold time, , and to transmit the first event signal to the display apparatus , the display apparatus configured to select a first section of the pattern image displayed on the screen based on the first event signal received from the input device and to delete a pattern section which corresponds to a coordinate value belonging to a first section based on one of the coordinate values last stored in relation to the pattern image; and. wherein if the time for which the volume section exceeding the preset threshold level is maintained exceeds the preset threshold time, the controller generates a second event signal that is to cancel a job for a second section wider than the first section based on the last stored one of the coordinate values stored in the display apparatus . a communicator configured to communicate with the display apparatus ; a sensor configured to sense a sound (S1110); a volume extractor configured to extract volume sections from the sensed sound (S1120); and characterized by a controller configured to generate a first event signal to cancel a job by a preset first section based on one of the coordinate values last stored in the display apparatus in relation to the pattern image displayed on the display apparatus if a time at which a volume section exceeding a preset threshold level is maintained is less than or equal to a preset threshold time, , and to transmit the first event signal to the display apparatus , the display apparatus configured to select a first section of the pattern image displayed on the screen based on the first event signal received from the input device and to delete a pattern section which corresponds to a coordinate value belonging to a first section based on one of the coordinate values last stored in relation to the pattern image; and. wherein if the time for which the volume section exceeding the preset threshold level is maintained exceeds the preset threshold time, the controller generates a second event signal that is to cancel a job for a second section wider than the first section based on the last stored one of the coordinate values stored in the display apparatus . <EOS>