This study is the ethnography on the authenticity of experience of tourists and residents from constructive perspective through fieldwork and participant observation. The purpose of this study is to analyze the meaning of authenticity of the tradition of Yangdong village under the social conditions called ``tourism in Yangdong village`` by thick description, by focusing on interaction of tourists and residents. The outcome of this study shows that tourists who visit Yangdong village want to see and experience things the way they are there, likewise they expect the tradition and history of Yangdong village to be in objective authenticity. The reasons why they do is that Yangdong village is living heritage listed as a UNESCO; to tell the truth, however, we found the authenticity of Yangdong village the constructive authenticity formed and given symbolic meaning in the social process. It was also revealed by the participation and involvement of the residents trying to reaffirm the value of tradition from the current viewpoint. Nevertheless the staged authenticity and the constructive authenticity in Yangdong village are priority objective for increasing the understanding of tradition of tourists.