The present disclosure relates to an endoscopy system. The endoscope system includes: a first light source unit which is installed on a substrate; a second light source unit which is installed on the substrate and which emits light when the first light source unit does not emit light; an optical unit through which the light of the first light source unit or the second light source unit passes; a light guide unit which induces the light which passed through the optical unit to the inside of a target object; an image sensing unit which senses the light reflected and reached from the target object and which converts the sensed light into an image signal; and an image signal processing unit which processes the image signal to display on a display unit. Images can be generated stably even when the light source cannot work normally according to the invention.