In this article the problem of functional genre, which is an important issue in folklore studies, is studied scientifically and theoretically. The formation of a new genre as a result of the process of deriving a genre from a genre has been brought to attention on the basis of specific texts. These genres are called functional genres and it has been considered on the basis of which specifics functionalize the genres such as “bayati”, “gerayli”, “goshma”, “temsil” and fairy tales. Thus, it was initially noted that the genre of “bayati” (quatrain) is not a specific genre, like many other genres, but, in fact, a literary formula. Because many genres are formed on the basis of the genre “bayati”. Among them are quatrains, lullabies, folk songs, ceremonial songs, elegy and other folklore genres are studied in the article and brought to the attention, due to this functionality, even before it was also considered that it was called a literary kind by A. Abid. In particular, it has been observed that the genres created on the basis of “bayati” are widely included in the ceremonial folklore and from the genres of “bayati” forms created in this direction such as wishes, lullabies, Novruz songs, beliefs, occasions, religious holidays, laments, etc. have been looked through. As a functional genre “garayli” like the genre “bayati” has been put forward as a new problem in theoretical and methodological research and garayli, folk songs and important parts of epics, which appeared on the basis of the genre garayli can serve as an example of it as the main genre component. In the article the genre “goshma” is also studied as a functional genre. So, on the basis of this genre “goshma”, “tajnis”, the verse part of epics, “ustadname”, “vujudname”, “gifilbend”, “baghlama” and other genres were formed. Fables have also been brought to the attention as a functional genre, such as representation derived from this genre, allegorical narrative, examples that arise in written and oral literature, etc. can be examples for it. At the same time the representation is manifested both in fairy tales and the fairy tale itself has spawned many genres from itself. The genres of fairy tales, garavelli, anecdotes, jokes and other genres have been reviewed. The theoretical problem proposed in the study is rich in important innovations for the scientific community.