Through the book of Kitab-ul Huruf, The relationship between language, thinking and logic in Fârâbî

In this study, based on the Fârâbî's Kitabul Huruf book, language thinking and logic issues and their relationship with each other are examined. This study consists of three section and result as well as the Introduction section. In the first chapter, as a fo-unding text of Islamic philosophy, Fârâbî's Counting of Sciences work has been analy-zed. In the second chapter, informations about Fârâbî's life, Works, scientific persona-lity, and assorting of science has been given. In the third chapter, it has been examined as language, thinking and logic relations in Fârâbî in sub-headings, conceptual basics, language concept in Fârâbî, mind and thinking concept in Fârâbî, logic concept in Fârâbî, the history of logic science, grammar and logic relations, In the philosophy fic-tion Fârâbî's relations between language, thinking and logic, language and its develop-ment in Fârâbî, and lastly constructing the connection of logic and philosophy fiction. In the last chapter, in the context of the protection and development of the mind and men-tal health of an individual, expressing meaning of language, thinking and logic sciences have been pointed out.