Aggravation of human urbanization process has caused a series of ecological environment problems, resulting in the aggravation of contradiction between human and nature. Especially the continuous occurrence of epidemic disastersgreatly endangers human health, destroys urban order, endangers social stability and sustainability, and causes irreparable social and economic losses. Based on an analysis of major epidemic disasters in the history, this paper from a perspective of ecological planning looks for the root causes of the epidemic disasters and the problems existing in ecological planning, such as lack of attention to biology, especially to microorganisms. The study focuses on the relationship between people and biology (animals, plants, and micro organisms) and improves the concept and strategy of healthy city construction and ecological planning. For future ecological planning, it proposes to establish and improve the living environment for the harmonious coexistence of human and biology (animals, plants and microorganisms), to strengthen biological planning, especially the planning of animals, plants and microorganisms, to change the concept from people-oriented to the unity of man and nature, and to build a life and health community of human and nature.

healthy city  /  ecological planning  /  biological chain