Berdibayev Rakhmankul was a specialist in folklore, a literary critic, a Doctor of Philology (1970), a professor (1983), an honored worker of science of RK (1984), a winner of a Valikhanov award (1990), an honored worker of culture of RK (1992).
Graduated from the faculty of the Kazakh language and literature of the Kyzyl-Orda teacher training college (1949).
A director at high schools of the Southern Kazakhstan area (1949-1953), literary employee, head of department of «Kazak adebiety» newspaper criticism (1954-1959), senior research associate of Institute of literature and art of Academy of Sciences of Kazakh Soviet Socialist Republic (1961-1968), responsible secretary of the chief editorial board of the Kazakh Soviet Encyclopedia (1968-1970).
A head of department of folklore in the M. Auezov Institute of literature and art.
In his researches and monographs devoted to modern Kazakh literature, Berdibayev Rakhmankul developed questions of literature formation and development, in particular of a novel, interrelations and a mutual enrichment of Turkic literatures; analyzed an image of a contemporary, questions of tradition, skill and innovation.
The main direction of folkloristic researches of the scientist was epic oeuvre of the Kazakh people, art of storytellers and akyns. He was a collector of a number of folklore and literary editions, the author of textbooks for the high school, also one of the main authors of History of the Kazakh literature in 6 volumes, published in 1960-1967.
For about 30 years worked as a president of Almaty Public University of literature and art that played a certain role in promotion of scientific knowledge, directed by actual problems of the Kazakh culture. Was a board member of the Union of writers of Kazakhstan and central office of Republican committee on protection of monuments of culture, chairman of the Kazakhstan-Iran society.