This research attempts to reveal the methodology of Linguistic research between two great and contemporary scientist, one of which belongs to the Visual School، which is the shy I b n masَ a da، the moth important of the linguists of his time, and al- farraa understand people of ku fa in Arabic after AL-ksaie. This research shows the foundation of Quranic studies and the methodology of research during the second and third centuries AH, and thus wecan conclude that contents of these books is a language related to reading and dialects and the issues of grammatical، morphological and interpretive.