This thesis designed a type-C goniophotometer to improve the disadvantages of the current goniophotometer by some design of mechanical structure. By the use of a fine-tuned mechanism, the center of luminaire could be adjusted. Set up a hood in front of the illuminance meter to reduce the stray light and use a synchronously rotating mechanism to eliminate the cosine error caused by the incident angle that light launch into the illuminance meter by. In addition, changing the measurement mode of goniophotometer, the required time to measure the light distribution curve of the luminance was significantly reduced. Finally, this thesis proposes a new alignment method which can be easy and fast to complete the alignment of a goniophotometer.