Da-wu is one of the traditional areas of Paiwan People. The indigenous peoples originally lived along the middle and upper reaches of the river were relocated to plain villages by the Nationalist government during the postwar period (1950-56). The collective migration was accompanied by the ”Shan-di San-da Yun-dong.” These two actions taken by the government have dramatically changed the life style of indigenous peoples at Da-wu area. This presentation will discuss the relation between collective migration and life style change at Da-wu area.