This study aim to identify that Choi Bae Dal's Realizing by Miyamoto Musasi's Book O-Ryun-Seo of Man-Ri-Il-Kong. We can find that this study put forward The Spirit of Budo(Martial Art) in these days. To sum up, at first, this study has important preview of in these Days Bu-Do-In(Martial Art). Second, Choi Bae Dal's Keuk-Jin Karate is came from Miyamoto Musasi's Book O-Ryun-Seo. Third, Choi Bae Dal's Keuk-Jin Karate's Ground spirit is came from Miyamoto Musasi's Book O-Ryun-Seo of Man-Ri-Il-Kong. Fourth, Bu-Do-In(Martial Art) and Bu-Do(Martial Art) Teacher must be formula Study A Study on Miyamoto Musasi. Finally, We must make basic spirit of Budo(Martial Art). It is Miyamoto Musasi's Book O-Ryun-Seo of Man-Ri-Il-Kong This study show us that Choi Bae Dal's Realizing by Miyamoto Musasi's Book O-Ryun-Seo of Man-Ri-Il-Kong is very important thing in these days. In conclusion, we must inquiry this study more and more. And we can find essence of Budo(Martial Art) spirit for these days.