An apparatus for simultaneously measuring whiteness and coating amount, according to one embodiment of the present invention, comprises: a light-emitting unit arranged at a predetermined distance from a test piece and irradiating the test piece with light; a filter unit arranged between the light-emitting unit and the test piece and allowing either an infrared ray or a visible ray to selectively pass therethrough; a detection unit arranged at a predetermined distance from the test piece and detecting either the infrared ray or the visible ray to be reflected from the test piece; and a calculation unit connected with the detection unit, calculating the coating amount according to the amount of the infrared ray detected by the detection unit, and calculating the whiteness according to the amount of the visible ray detected by the detection unit. Since the whiteness and the coating amount can be measured by the apparatus for simultaneously measuring the whiteness and the coating amount according to one embodiment of the present invention, work efficiency is increased and capital expenditure for equipment can be reduced.