Part I The concept and developmental tendency of Ecological Economics The tasks of E.E A.Providing the theoretical guidance for sustainable development strategy of society and economy. B.Providing the science foundation for the design and construction of E.E.S C.Providing a good model for improving the comprehensive benefits of E.E &The category and requlation of E.EThe tasks of E.E A. Providing the theoretical guidance for sustainable development strategy of society and economy. B. Providing the science foundation for the design and construction of E.E.S C. Providing a good model for improving the comprehensive benefits of E.E The category and regulation of E.E Part I The concept and developmental tendency of Ecological Economics