The specialist final paper deals with a very broad topic of sustainable development of the Republic of Croatia and the European Union. Sustainable development is the basic framework for forming strategies and policies for continuous social and economic development, with minimal or no damage to the environment and natural resources important for future development. It is extremely important to create an idea where non-renewable resources are not wasted and the environment is not devastated, which would endanger the existence of future generations. It is necessary to create ways of production and consumption that are extremely focused on protecting ecosystems and natural resources. to develop a concept that is applicable in all countries of the European Union and the world.Such a strategy is a great challenge for the leaders of the European Union and its executive bodies, which are the main drivers of strategies that are replicated in other countries. Each country is required to conduct a series of analyzes detailing which areas of action are most at risk and where urgent implementation of new production methods is needed to protect further devastation. When mentioning the universal agenda and global goals, it is important to mention the United Nations Sustainable Development Agenda. 2030, according to which the European Union and the Republic of Croatia further developed all sustainable development strategies. The international community has reached a consensus, through the adoption of the Program, that peace, justice for all, social inclusion and security can only be ensured through close and unconditional cooperation, completely abandoning the divisions that have so far created divisions such as ideological, religious, gender, material and many other factors. The Republic of Croatia strongly strives for sustainable development and demographic renewal, which it will achieve by setting priorities and creating a clear vision, and at the same time strong support within the implementing bodies.