Abstract:There is an important significance of studying of forest biodiversity assessment for promoting the conservation of forest biodiversity and enhancing biodiversity management in China. The paper collected forest biodiversity assessment-related data from 2001 to 2010, and used of optimal control methods in Economic Cybernetics to establish the evaluation model, and calculated the optimal price for forest biodiversity assessment based on the nature reserve area. The studies showed that forest biodiversity assessment of the optimal price was 9,970 RMB yuan/hm2, and there was a dynamic model of evaluation. Finally, the study suggested Chinas forest biodiversity assessment should use the shadow price, and should consider the social, economic and other factors.