Abstract: Located in the south of Hainan Island,Yalongwan is a famous scenic spot and vacation land. There is abundant butterfly fauna in natural secondary forests of Yalongwan due to the special geographical location. Up to now, 181 butterfly species belonging to 114 genera, 11 families have been collected. 1 new subspecies, 9 species endemic to Hainan Island, 5 rare species, 26 species of higher ornamental valus, and 29 dominance species were founded. 149 butterfly species in Yalongwan belong to Orient Region, accounting for 82.32% of total species. A butterfly exhibition garden has been established in Yalongwan. The garden contains a butterfly exhibition hall, a natural and net closed yard for exhibiting live butterfly, butterfly raising hall and other relative facilities with characteristics of reasonable layout, good viewing and high value for popularizing the knowledge about butterfly. The ecological benefits in natural and net closed yard are increased by combining natural tropical plants and brook. The close combination of artificial and natural butterfly yard will benefit to the sustainable utilization of butterfly resources. After one year of opening to the outsides, totaling 205020 persons visit the garden which brings $2665272 (RMB) ticket incomes and $666229.9 incomes of selling butterfly artwares. Cosponsored by Butterfly Branch of China Insect Academy and Yalongwan Limited Co., the first national butterfly workshop was held in the Yalongwan in 1998. In shot, great ecological, economic and social benefits have been made in Yalongwan.