In this study, we discuss the Quranic approach that establishes faith in man, by offering the tools that form the Quranic approach or that the Quran has used. It is the approach of common sense, reason, debate and story. So, our study discusses these methods objectively and scientifically, and shows the applications of every approach taking them from the Qur’an itself. After defining common sense, we deal with its applicable area, such as the phenomena of livelihood, life and death, and Knowledge of the Unseen. These areas cause to man an obsession that drives him, by common sense and conscience, to believe in the oneness of Allah. So is the rational approach. Reason in the Qur›anic and Hadith texts is the implicit authority, while prophets are the explicit authority. Reason, for man, is the tool of thinking, and the measure of distinguishing between good and evil. In fact, the realizing of all good is done by reason. We have defined reason and mentioned its applications, including the belief in the Wise Maker and Administrator, and the belief in prophethood and afterlife, and so on with the rest of the other approaches, such as debate which is just a goal and purpose, but not a means to get to the right and distinguish it from falsehood. Then comes the historical narrative approach, which has so many divine lessons and examples. The result of this study is to get to the fact that the Qur’an has rooted in man certain beliefs that form the basis of the faith in Almighty Allah. As to the term of Qur›anic approach included in this study, we mean by it our understanding of the method and the way which the Holy Quran followed through its holy verses, to consolidate and root faith in the soul of man. The method used in these verses may be to raise reason, common sense, or persuasion, so that man may get to know well Almighty Allah, know His prophets and messengers, and know resurrection and the Afterlife. And so on in the rest of the doctrinal system.