With the process of the global urbanization，most cities face a common set of core environmental problems such as poorair quality，high noise levels，greenhouse gas emissions，water scarcity，contaminated sites，brown fields and challenges in resource efficiency. Sustainable development and fit-for-life are the core measures for urban development and construction. This paper introduces the most influential “European green capital award”，summarizes the good practices of previous European green capital and other application city in terms of climate change mitigation，air quality improvement，green livable city development. It also demonstrates specific measures of the greenest capital Copenhagen in energy supply，traffic improvement，town planning，in order to provide reference for ecological，low-carbon and livable city development of China’s new urbanization.