The history of Franco-Brazilian relations is rich in crossed exchanges and migrations. This is evidenced by multiple cultural productions and the migrations of Brazilians who came at different times and in more or less difficult political circumstances, or those of French people who went in search of new horizons, not to mention the intellectuals whose name is attached to this country. The article discusses the main approaches, principles, and foundations of France's and Brazil's cooperation in the face of ecological and ecosystemic issues. Furthermore, this article examines the cooperation of these countries in the regional structures which aims to protect the environment one of the most important global challenges of our time as well as analyses trends, progress, and gaps between both countries through the UN Sustainable-Development Goals (SDGs). Moreover, it examines the legislation in the field of environment and efforts made by such countries to implement the UN-2030 Agenda for SustainableDevelopment.