On the basis of theoretical knowledge and scientific facts accumulated by folklore and linguistics in the article with an application of logical-and-historical analysis the authors restore a retrospective picture of folklore texts genesis. Compensating the missing historical facts by the logic of a dialectical unity of language and folklore development, the authors form a universal model of the genesis of ideas and text organizing means of folklore prosaic genres. The suggested model can also serve as a systemic methodological tool for solving the multi-level scientific tasks explaining the formation of a comprehensive scientific picture of the development of literature and literary environment.