Abstract: The theory and practice of Cybernetic Ecosystem Engineering(CESE)were discussed in relevant to the great achievements in shelterbelt network construction in China.It was concluded that the researches on biological sciences were to explore the secrets of life from the view of microcosm and how to control and utilize of the ecosystem from the view of macrocosm.Then the mechanisms among the "Blackbox","lnstantaneous Model"and"Bioproduction Unit"in the CESE as well as the importance of CESE to the forest-shelterbelt construction in China were futherly elaborated.