In this paper we researched European Union starting with the Agreement from Maastrich from year 1992, even though the European Union has a long traditional history and its origin is founded on regulations of economical integrations in Europe beginning from the 1950’s through the Roman treaty from year 1957 and the forming of the European Union Committee in year 1965. Further we follow her expansion and introduction of the European economic and monetary policy, to last, the joining perspective of Croatia. According to the Agreement from Maastrich, European Union lies on three posts: 1) Legal-political and regulative post, 2) Economical post, where the forming of European economical and monetary policy is in the first plan, especially the int...