The subject of this research is eco-city planning and environmental awareness. Eco-city planning, which has a long history, has become increasingly popular in recent years. Today's cities are the main source of many environmental problems. If we want to protect nature, we need new understanding and ideas. In this context, concepts of sustainability and ecology and a solution that can integrate these principles in all parts of the city should be produced; Factors that lead to the emergence of a new understanding of the world. The social orders that will be created in this new world will be based on the utopian tradition; whose purpose is to create a more equal, just and happy society like the society of Utopians. The urban plans of Saint Simon, Charles Fourier and Robert Owen (ideological socialists) in the 19th century aimed to reduce the social, economic and spatial disturbances caused by the industrial revolution and were formed with ideological approaches; And 20th century urban utopias such as Ebenezer Howard's Garden City, Frank Lloyd Wright's Broad Acre City, and Le Corbusier's contemporary and radial cities are pragmatic approaches produced to meet economic, social, and spatial needs. In this research, an in-depth descriptive-analytical method was used and an attempt was made to study the process of ecological planning and environmental awareness in response to the ecological crises we are in by using the idealists' thoughts of the nineteenth and twentieth centuries.