The construction of eco-city is meant to harmonize the social, economical and natural development, with high-efficiency use of the material, energy and information. Eco-city is the inevitable choice of a city development in future. It is very important to explore the eco-city construction in the context of ecological civilization. In the background of ecological civilization, the relationship between ecological civilization and eco-city construction is explored. Furthermore, the importance of eco-city construction has been discussed. Finally, the eco-city theories and practical experiences abroad are summarized and some opinions and advices on eco-city construction in Shenyang, China are given.