Eco-city is the goal of achieving sustainable development in economy and society. It is of vital directive significance for the urban planning development to research on the economic efficiency of eco city construction. This author analyes the connotation of eeo-city and the status of domestic and foreign eco-city construction, which begins with establishing the appraisal system of Eco-city. A train of thought is offered of which dynamic evaluation and sensitive analysis for inputs and outputs of eco-city. The research also brings forward scien tific basis for eco-city construction of selection priority areas investment and the best scheme.