The present critical analysis is to represent origin and organizational structure of Stanislaw Leszczynski Academy in Nancy in the period of its rise. In Polish historiography results of research works over Stanislaw Leszczynski Academy are insignificant There has not been published any treatise on the whole activity of Academy up till now except two not large articles written by Arnold Kirszbraun in 1929 and Cz. Biszynski in 1937, and except several references that appeared in previous biographical studies on Leszczynski. Stanislaw Leszczynski was going to found an academy in Nancy when visiting Lorraine in 1737. However, the political circumstances were not favourable enough, because in chancellor la Galaiziere's opinion, concentration of the independent intellectual circles could impend over the initiated process of integration between Lorraine and France. A king of Poland and a prince of Lorraine and Bar - Stanislaw Leszczynski - on 28 December, 1750 enacted an edict, which established an institution that was to contribute to science and animate development of intellectual life in its various fields. The edict consisted of 10 points and gave detailed regulations on the activity of newly established institution. To sum up, one should add that in the Society was observed a great anxiety for exploring the real, acceptance of the opinions that were propagated by encyclopaedists, trust in the power of intellect, contemptuous distrust of tradition that was said to be closed in belief's principles, and strong conviction of the progress of humanity. Academy of Stanislaw was not only the place of exchange and confrontation of views, but also the centre of critical estimate. Attendance at Academy of king Stanislaw was perceived in Nancy as a crowning achievement in work and good taste of candidate. Academy had not only assembled, but also made vivacious and creative the whole Lorraine elite of the intellectuals in the 18th century.