This work focuses on people from ancient times who have expressed themselves through an oral culture. In its early stages of development an oral culture has no written language. As an example, the Atayal tribe, the aborigine of Taiwan has no written language even now. Therefore, throughout the centuries their history, moral, rule and wisdom have been transmitted orally. Of all others, they have the special way of oral culture named Rosho. It is not only to sing but to chant. Rosho covers important aspects of the match and the intercession. It is not a mere communication of records. Rosho plays a significant function. It passed the native tongue down from generation to generation. And it protects Atayal tribe's identity. However, these days there is an increasing tendency for external factors to gradually bring about change in this long-established tradition. This paper presents research on the pattern of change of Rosho in the Atayal tribe, with the understanding that this pattern can be applied to other cultures.