Since the 21st century, eco-community has become an inevitable trend in global community planning and development due to increasing attention to environmental sustainability and the quality of living standards. The concept of “cradle to cradle” is based on the core ideas of low-carbon and circular development. It has gradually formed a scientific theoretical framework in the process of eco-community planning and research and has been applied in many eco-community practice projects in Europe. However, due to the different stages of development, the focus on eco-communities in East Asian cities is mainly centered on the preliminary planning and design stages, and there is a lack of research and evaluation on the “whole life cycle” of eco-communities. This paper analyses the design concept of “cradle to cradle” and conducts a full-cycle, multi-angle ecological analysis of Heudelet 26 in France and Tsuruoka House in Tsuruoka, Japan, in order to explore the ecological initiatives of cyclic development in community building, which will then be useful for the planning and design of eco-communities in China and other East Asian cities. This will provide a reference for the research and practice of eco-community planning and design in China and other East Asian cities.