The present invention relates to a system for marking optical film fabrics and a method for marking optical film fabrics. An optical film marking system according to an embodiment of the present invention comprises: a supply roll for supplying the optical film fabric in a first direction; a marking unit for marking a knurling mark or original information on a marking area other than an effective area attached to a display panel among the optical film fabric supplied in the first direction; a light source unit including a light source member for supplying marking laser light to the marking unit; and a receiving roll for receiving the optical film fabric.