At first, we explained concepts of Oseong(五聲) in "Akhakgwebeom(樂學軌範)" and then compared them with O-eum(五音) in "Hwangjenaegyeong(黃帝內經)". In that progress we can have recognized the commonness and differences between two texts, and became familiar with ideas of sounds in minds of ancients. That ideas are concerned with true nature of human and cosmos. Based on that ideas, we could return to stasis of mutual understanding with each other, it means a condition of harmony. For that purpose we must understand detail meanings of O-eum(五音) and Oseong(五聲), and this analysis lead clinical music therapy to do an important thing as methodology of treating human body and minds. The ideas of O-eum(五音) in "Akhakgwebeom(樂學軌範)" are not exactly corresponded to vocalization of Hunminjeongeum(訓民正音) that is Korean characters, and Oseong(五聲) in "Hwangjenaegyeong(黃帝內經)". But this dissonancy is a problem of methodology, on the contrary, there are many common concepts and possibilities of application to practical uses between them.