Integrated with the study on Chengdu space developing strategy, in this paper, the problem about Chengdu water resource is analyzed and it is concluded that the Chengdu water resource has comparative advantage and can support its great development.But the construction mode must be observed.On the microscopic layer, the water resource was deteriorated in Chengdu City.A fundamental of gradual eco-construction is suggested, which is adapted to the city space construction.The key of the city eco-construction is the coordination of water resource with the city development.