It is widely acknowledged that two methods of writing have emerged in the history of usūl literature: Juristic method (usūl al-fuqahā) and theological method (usūl al-mutakallimīn). Although there are some attempts to determine the typical features of these methods, we do not have a comprehensive explanation regarding the criteria of this distinction, the motivation behind it and the period when these methods have become prevalent. This paper aims to shed light to certain dimensions of the issue and focuses especially on the impact of juristic disputations and khilāfiyāt on the emergence of juristic method. The discussions about the sources and methods of religious knowledge were a significant part of the heated intellectual debates in the early period of Islamic scholarships. These discussions made by scholars interested in theological matters in kalām context were the matters of usūl, which would have turned into a separate discipline thereafter. The aforementioned period also witnessed Hanafīs completing the first fiqh compilation by recording the body of masā’il in fiqh that they had developed and codified. Hanafīs then involved in the methodological discussions of theologians in the context of justifying their juristic views. The tradition of scholarly discussion that had widely contributed to the earlier period took a new dimension by the introduction of jadal to the Islamic world. First theologians and later jurists adopted the method of jadal in their debates and scholarly works. By the 4th and 5th centuries AH, fiqh became popular more than ever and promoted the juristic disputations in such a way that those disputations turned into a common and significant performance among Islamic intellectuals. Meanwhile, the khilaf genre, in which the disputed juristic matters have been discussed and justified, improved in those centuries as well. Consequently, a new method of usūl writing, namely the method of fuqahā, which can be applied in the justification of the masā’il and in juristic disputations, emerged. Thus, the first and most typical work of that method, Taqwīm al-Adilla by Dabūsī, perfectly addressed the needs of the disputation tradition in the era, by including many chapters that could be regarded as related to the substantial law and many examples from substantial law, by treating the jadal topics in qiyas and ‘illa chapters in detail and by avoiding the speculative theological disputes. Later, the method developed by Dabūsī attracted attention and many jurisprudents wrote usūl works adopting the method before the end of 5th century AH. Especially the usūl work of Bazdawī served as a model for the later Hanafī usūl literature. However, the juristic method lost its popularity when the Islamic scholarships fell under the influence of philosophy and logic after al-Gazālī and al-Rāzī. Jadal and ‘ilm al-bahth wa’l-munāzara have been treated under the discipline of logic afterwards. Nevertheless, even after the evolution of the usūl perspective, some Hanafīs still wrote usūl works by juristic method and some of them, despite adopting the new philosophical perspective, referred to the usūl of Bazdawī in their “mamzūj” (combined) usūl works.