The article entitled “The economic conditions for the application of advanced energy technologies (clean coal technologies) in the Slovakia`s energy sector” is based on the development program for the Slovakia`s energy industry, which includes the implementation of the advanced energy technologies (CCT) in utilities. It quantifies the needs of the implementation of projects applying such technologies and specifies a rough production costs for the energy produced by different types of energy facilities. The current economic conditions of the CCT operation are decribed along with the definition of the conditions for their future efficient application. The authors outline expected system measures aimed at enhancing the application of highly efficient technologies in the energy industry, including renewable energy sources. The article, in a transparent form, makes a realistic evaluation of the current situation and a likely development in the application of clean energy technologies.