In GMS-2200 Goniophotometer, the tested luminaire rotates only around the fixed vertical axis in the prescribed burning position and a reflecting mirror rotates around the horizontal axis, meanwhile, the mirror on rotating table in the opposite side rotates around the horizontal axis synchronously to pursuit the measuring beam reflected by the first mirror, and then reflect the measured beam perpendicularly towards to a fixed detector at the horizontal rotation axis. The combined motion of the luminaire and mirror permit the measurement of luminous intensity at the direction of any horizontal or vertical angle without titling the luminaire.