In order to better examine and analyse impacts of humanism on the long-term and sustainable eco-city development, it is of great importance to understand leading theories and main evolution trends from both humanistic and ecological perspectives to guide the concept of humanistic planning under the idea of ecology. This chapter provides the overall understanding of the humanistic planning—Ecological Urbanism regards people-oriented concept from the holistic disciplinary view, which ‘considers all factors which make up physical, social and economic needs of a community and relates them to the greater environment’ ((Rogers, R., Cities for a Small Planet. Westview Press, <publisher-loc>, 1998), p.53). Garden City provides a foundation for critically exploring the relationship between people and place. Then it moves to another key concept outside urban planning discipline, Environmental Psychology, to discuss the interaction between people and physical environment from psychological perspectives, such as people’s needs and their behaviours. By adopting Gibson’s affordance theory, this research argues the environment itself is meaningful and consists of opportunities for people’s behaviours.</publisher-loc>