The historic evolution of a city experienced three stages of "natural ontology","humanities ontology" and "ecological ontology".Eco-city construction conforms to the historical trend of urban development but suffers a real impact.In order to achieve the target selection –an eco-city for the new paradigm of urban development,we need to form security mechanism from the macro,meso and micro levels,and finally make the path selection in three aspects of the eco-environmental protection,eco-economic ...