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In recent years, the idea of Green economy has been widely discussed by experts in environmental economics and in various political forums. Many countries use various tools and principles of Green economy in their national policies and growth strategies. However, some countries fear that the transition to a Green economy model may hamper their development in the context of the philosophy of modern ecology. That is why the formation of a clear methodology for the Green economy is essential today. The article discusses the prerequisites for implementation, the basic principles of Green economy into the pub- lic administration system, and provides a system for modelling ways to implement the principles of Green economy using the IDEF0 methodology in the context of the philosophy of modern modern philosophy ecology. This methodology allows seeing clearly the ways and means of achieving this goal.