The laser beam that endoscopic system of the invention includes light source generates a red, the green colored laser beam of color laser crossbeam blue, difference Optical guide unit P has first end section P1, these laser beams are entered and second end section P2 irradiates laser beam to subject Photo detecting unit 41 detects the reflected light from the object and exports detectable signal corresponding to reflected light Memory 61,62 passes through each subject for storing multiple color parameter collection And image processing part 71, observation image is generated, according to the detection signal, at least one parameter of these correction color observation images corresponds to object according to Colour selection.