The purpose of this study is to analyze the interrelation of architectural composition and type of windows and doors in Korean traditional architecture. Windows and doors type, in Korean traditional architecture, is one of the important element which used to playa great role in building's physical fasade, so that used to subjected the building as a whole. In this study, the investigations on the totally 88 Korean Buddhist Temples are made, and the analysis are made according to the physical size of buildings (length and height of JUGAN), composition of JUGAN, and existence of RUGAK. The result of this study indicates that there are outstanding typical differences of traditional windows and doors in advance to variation in the physical size of building, though there are numerous interrelation between typical differences of traditional windows and doors and composition of building as a whole.