The purpose of the study is to find out the origins of Kata and Keiko of Oriental Martial Arts through the concept analysis method, and to explain their meanings and roles. 1. The entire practice to learn Kata is called Keiko. The two could be observed in the entire Oriental culture with their appearance in many Buddhist and Taoist scriptures, as well as in Confucian one. 2. Keiko and Kata refer to significant practice courses and methods that require so much time to learn. It is no exaggeration to say that the two account for the most of Oriental Martial Arts. Therefore, they are the history and philosophy containing the essence of each school of martial arts. 3. Kata is the contents of Keiko, and its forms and methods differ by event of martial arts. However, all the various events boil down to one basic fact that they pursue indirect learning of real experiences, told by Confucianism such as 'learning Chinese characters' or 'imitation'. 4. The meaning of Keiko observed in the scriptures of all three Oriental philosophies, I.e. Taoism, Confucianism and Buddhism, includes reviewing the old and learning the new(溫故知新) through the Trinity(三位一體). In other words, Keiko is the start of practical philosophy of learning new knowledge and further developing them by learning old teachings through the process of strengthening one's body by exercising martial arts, studying (Confucianism) and realizing Zen(禪․Taoism and Buddhism).