In this scientific paper for the first time were investigated the innovative approach of the local literary heritage of Ganja on the basis of various historic sources as manuscripts and archive materials. Have been researched the comparative materials of such poems as "Treasury of mysteries" and "Iskandername". Also were systematic investigated the importance of these poems of great poet and thinker Nizami Ganjavi in research of historical past of Azerbaijan. In academic paper based on such sources as manuscripts have been researched problems on investigation of basic characteristics of cultural heritage of the ancient East, also some features of formation and historical development of legal culture in society from the point of ethnographic-literary point of view. For the first time by author were researched the problem of similar socio-cultural features in these poems on the real samples from the different manuscripts and archive sources. Dialogue culture between Eastern and Western civilizations and multiculturalism values were investigated on the basis of comparative study of these literary samples. Have been proved, that Nizami Ganjavi told about the importance of protection of dialogue culture between nations as the main element of the peace.