Research generally implies diligent and systematic enquiry to discover or refine facts of knowledge in any particular field of endeavor. The essence of research in any field is to extend knowledge, and to cope with the demand of the area, a valid approach has to be developed by experts and specialists of the domain. Therefore, this paper examines the method used by the Quran‟s interpreters that is Mufassirun which they used in their Tafasir and it can be used in any Islamic-related research nowadays. Also this paper explains the standered method used by Muhaddithun in the Sanad and Matan of the Hadith when analyzing its authenticity or quality. The method used when conducting this research is analytical method.