The attempts at efficiency estimation in changes of energy management in Poland give different results. The origin of this ambiguity is an application of different criteria of analyses. They conceive of no efficiency in the categories essential for the future of economic systems, that is in categories of sustainable deve- lopment. In the article such an attempt has been undertaken. The analyses embrace two sectors of energy policy - the hard coal industry dominating in Polish energy balance, considering exhaustible energy resources and electro-energetic industry encompassing manufacturing, processing, transport and sale of electrical and heat energy. The subject of analyses is: 1. The influence of changes of ownership, the organisational and agent structures of the above- -mentioned branches of economy on production factors effective from the point of view of sustainable development. 2. Answering the question if these changes will lead to marketing the economy in accordance with the EU standards and if the direction of the marketing gives a profitable set of sustainable development conditions. 3. Presentation of which links and dependencies come into being between the above- mentioned fields of economy as a result of the changes occurring in their structure.