Imam Shatibi, the man who looked forward to the reform project in the field of Islamic sciences in general and jurisprudence especially, particularly in the temporal conditions that were experienced by highlighting the mental innovative and creative of him. This study is to clarify how Shatibi moved Usul Fiqh of particles presumptive to college certainties through the statement of the circumstances that led him to this transition, and how he followed the inductive approach to prove the purposes of Shariah. The first objective of this study is to understand these renewable mental, which contributed significantly to the enrichment of Islamic knowledge heritage, which prompted the researcher to study part of this cognitive shift based on inductive and analytical approach for its corresponding to the research topic. Since the study deals with the figure from its scientific and regenerative aspects, through analysis and description of his approach, and tracking its hierarchy of cognitive transactional stages in details. The researcher also adopted the comparative method, to compare this study with its peers of other studies in the same field, as well as the historical method to record the conditions of its cognitive leap historically, in the context of the fundamentalism study.