Case study of a Tibetan Town in southwest indicated that town development was based on the special natural environment and ethnic culture. The ancient town and Tibetan Temple located on the axis of due north--south in the mosaic landscape of hills and mountains alternated with meadows, wetlands and rivers reflect the architectural pattern of the town with traditional Chinese culture that nature and man are in one. The fast development resulted in the degradation of forests, meadows and wetlands and the water pollution, particularly landscape pollution. Experts, local officials and indigenous people got together and, in terms of landscape ecological construction, worked out an ideal town development plan characterized by traditional environmental outlook (Fengshui), Tibetan culture, dense forests, colorful meadows and clean rivers.