A method of compensating for coordinates of an edge portion of a touch sensing system is disclosed. The method includes calculating coordinates of a touch point, suitably converting the coordinates of the touch point based on a resolution of a display panel, deciding whether or not current coordinates of the touch point are present in a bezel area outside an active area of the display panel, in which an image is displayed, and when the current coordinates of the touch point are present in the bezel area, modifying the current coordinates of the touch point into edge coordinates of the active area contacting the bezel area.