Abstract:The Emergy and material flux of Poyanghu wetland ecosystem were analyzed in this paper by Emergy analysis theory of ecological economy system which was created by H.T.Odum. The article concludes that four steps should be included in the emergy analysis process of wetland ecological benefits: (1) emergy analysis concept ional system should be built up, which can reflect the emergy analysis method; (2) emergy analysis table being drafted out and the emergy value being calculated; (3) emergy indices being esti...