This paper represents a collection of studies on the formation processes of new social structures, trends stratification of society in Moldova after two decades of independence, on assuming democratic values, on promoting economic, political, scientific and cultural freedom, as well as the human rights according to the EU programs. Socio-economic and political transformations have led to the formation of new social groups/strata, new professional structures and have modified the social structure as a whole. The survey has proved that in the Republic of Moldova does not exist a clear relation between education, occupation, income, property, lifestyle etc, which facilitates the identification of social classes. New social groups/strata appear not on the base of classical principles of stratification, but have specific national features, related with the privatization process, formation of the economy and market relations.