This study reviews the scientific approach of Pendidikan Agama Islam and Budi Pekerti Kurikulum 2013, based on scientific paradigm of positivistic, proposed by Auguste Comte. The results of this study reveal that the scientific approach in the curriculum 2013 is done through some steps: to observe, to question, to reason, to associate and to communicate. This scientific approach is relevant to the positivistic paradigm. The theory stems from the emergence of legal positivism of Law of Three Stages by Auguste Comte. It states that historical development of human thought has evolved in three stages, namely theological or fictitious, metaphysical or abstract, and positive or scientific or real. Thus, according to this approach, if scientific approach is applied in Pendidikan Agama Islam and Budi Pekerti Kurikulum 2013 in the aspect of Aqidah, it becomes less relevant. However, the aspect of Jurisprudence, Morality, Al-Quran Hadith, and Islamic Cultural History, the scientific approach is very appropriate to be applied into the learning process.