Some of Taiwan's aboriginal village landscapes have rapidly vanished form the countryside duc to the socio-economic change of Taiwan. This study is based on landscape architectural methodology and concepts in surveying and recording the changes of vanishing Atayal aboriginal village landscapes, through the "elements of landscape" and "the structure between landscape el- ements," The aim is to build up a set of design quidelines for a Visual Management System of countryside development. The area of Chin-Sui village is about 928.3168 acres. It's Population is 1,066. It is located in a subtropic area. Atayal prople used to burn their fields for agriculture and make their liv- ing by hunting. They lived together in a village based on blood relationships and co-worship, co- hunting. and co-sacrifices of a social norm. That social culture affects the functional pattern of space structure of landscape. Units of cluster housing, public social space, living space, and housing space consists of four levels and forms tree structure relationships. The effect of social change on the structure of space is similar to that of chemical structure change. The four topics--the meaning of "Naturalness," the uniqueness of Atayal aboriginal culture in the countryside, the concept of using the Limit of Acceptable Change for planning, and Vi- sual lmpact Assessment, aaare discussed. This study suggests we need to build up a Visual Impact Assessment system to review every project and development activity for future land use.