Abstract: The economic value of Yellow River coastal wetland was evaluated by ecological emergy theory and methods established by H.T.Odum. The result showed that: renewable energy resources was 3.16×1020 sej, non-renewable energy resources was 2.94×1020 sej, socio-economic feedback reached 3.37×1021 sej. Among the various emergy output, the value of ecosystem services was 8.54×1022 sej, which was the largest proportion of capital-output, indicating the ecosystem services of Yellow River coastal wetland was enormous; the following part was aquatic products and the emergy value was 1.47×1022 sej, which indicated the Yellow River coastal wetlands had great product-output value; the primary productivity was 1.95×1020 sej, the emergy value of waterfowl, zooplankton and benthos were 3.37×1021 sej, 2.59×1021 sej and 1.06×1021 sej, respectively; eco-tourism and research work value were 1.26×1020 sej and 3.87×1020 sej, respectively. On this basis, a comprehensive index of wetland emergy evaluation system was established, and the eco-economic system of Yellow River coastal wetland was found working better, having higher efficiency of output and greater advantages in various industrial modes of coastal wetlands, while the negative effect was highlighted. In a word, this study analyzed the indicators of sustainable energy, and provided recommendations for sustainable development of Yellow River coastal wetlands.