Revolving door is very popular in Europe and USA with high reputation because it can keep in- house comfortable by shutting air- ow. The door has been popular in the United States and European countries for a long time and now in Japan. The door, based on its own structural standpoint, allows only a little air ow between the outside and the inside of buildings so as to keep air condition in house constantly. Therefore, as a high-energy savings operator, the door system is most suitable for building territory where air-conditioning facilities are constantly operated through year. We, at Barrak Glass Factory, have developed a new revolving door to meet the current requirements of construction eld, as equipped with various functions such as “Speed Control,” “Reverse Prevention,” “Regular Stop,” and “Panic System” etc., in addition to the original features of the revolving door.