There have been many kinds of looms in Korea since ancient times, but there are few looms left, mostly after the 20th century. As of today, National Palace Museum of Korea owns two Treadle Looms and some parts. However, detailed structure and operation principle are not clear, because there are no important parts such as heddle plate, body, etc. This weaving machine is the only remaining weaving machine which is used for royal palace, so it is highly valuable for historical materials from the point of royal relics. In this research, it is to restore the Treadle Loom which is owned at National Palace Museum of Korea and to check whether it is to implement the weaving or not. To this end, it analyzed the shape of owned Treadle Loom in detail and grasped the nature. Furthermore, by comparing and analyzing for literature concerning Treadle Loom and similar domestic and foreign Treadle Loom, we produced the damaged parts and restored it. It is estimated that the production date for weaving machine at National Palace Museum of Korea was produced between late 1800 to early 1900. This loom has 4 heddles and 4 pedals. It has a reed pulling device and the fabric beam can be controlled by connecting the metal nail with a rope. It has 4 heddles and 4 pedals, and heddle was made by silk thread. The reed hanger was made by strapping black bamboo. As a result of restoring weaving machine and weaving it, it is possible for weaving of plain fabrics and twilled fabrics. On the contrary, there are some portions to complement for smooth weaving.Pedal should be come up from behind weaving machine, and separator of pedal should be installed. In addition, it requires the fixing equipment with sawtooth to operate loom roller easily.