The establishment of the European Economic Community in the year 1957 was aimed at creating an organization which would successfully compete against the strongest economies in the world. Thanks to the process of integration the member states achieved prosperity and a high level of economic growth. In the following decades, however, because of the challenges of globalization, increasing competitiveness of other economies and a slowed pace of development, which entails the growth of unemployment, the member states were forced to revise their current policy. The article is taking issues of the reform of law regulations in the electric energy sector in context of the Lisbon Strategy. The liberalization of the mentioned sector is connected with the wider process of restructuring European Union network sectors which concentrate on liberalizing reforms of market economies. The work concentrates in particular on the process of the liberalization of the electric energy market assessment and the influence of Lisbon Strategy guidelines. The most essential elements of the strategy are: instruments making their way to economic reforms of the internal market, instruments for the environmental protection supporting creation and development of innovative enterprises, optimal instruments conditioning responsible using natural resources and finally relatively new actions directed on the development of competition as part of correct functioning network sectors with particular attention on participants such as independent authorities.