The Mbosi, a large ethno-linguistic Bantu group living in the northern part of Congo (Brazzaville) have been able to cultivate and develop, throughout their history, a vast universe of values structuring a civilization that places them at the center of the group and intimately links them to the other Bantu peoples of Congo: Kongo, Teke, Maka. Supported by a virile language and a social organization that balances matrilineality and patrilineality, this civilization, which was destructured by French colonization, remains, however, embedded in the vast sum of Bantu civilizations of Central, Eastern and Southern Africa. In the present work, Joseph ITOUA who draws his inspiration from some rare publications on the subject, but especially from his direct observation and oral accounts and, regretting the little interest of the African researchers on this civilization, commits himself to make discover the most significant elements of these founding values of the Mbosi civilization.