Thi spaper reviewed the development of the thought of sustainable development and the theory of ecology and analyzed the change of energy value in the agro-ecosy stem of Dezhou City between 1998 and 2007 and the sustainability of the agro-ecosy stem .Results showed that the total energ y usage of agro-eco system of Dezhou City kept increasing during the study period

so did its dependence on non-renew able resources .Its enviro nmental loading ratio kept grow ing and its sustainable development was under g reat pressure .The agro-ecosy stem manag ement in the future should develop water-saving irrigation

int roduce advanced technology actively

increase the input of energy value of intellectual resources

adjust the input of indust rial supporting energy to improve the benefit ratio of energy value

and explore the ways of establishing a multi-level and high-function ecological agriculture .