Nowadays, religious radicalism becomes the attention of many people particularly among Muslims. This is caused by the effects of religious radicalism. Religious radical groups often misuse the meaning of jihad to legitimate violence leading to unrest in social life. It finally becomes a bad stigma for all Muslims. In fact, Islam doesn’t teach or call for da’wah in radical way. Therefore, prevention of religious radicalism needs to be done. This research discussed the deradicalization program run by government through BNPT, and investigated deradicalization concepts according to Muhammadiyah and Nahdatul Ulama. This research also discussed both the concepts and perspectives of Muhammadiyah and Nahdatul Ulama about the deradicalization program as well as to investigate how radicalism is resolved through Islamic education in those institutions. Substantively, this is a library research focusing not only on important issues of deradicalization and its concepts but also attempting to find facts and great ideas about deradicalization from the government agencies such as BNPT and Islamic organization such as Muhammadiyah and Nahdatul Ulama. The perspectives of Muhammadiyah and Nahdatul Ulama about deradicalization have been generally transformed in their environment reaching to the Islamic education field. In those two institutions, Islamic education becomes an object of study. The findings of the research indicated that BNPT, Muhammadiyah and Nahdatul Ulama have various ways, concepts, strategies, and instruments of deradicalization used in fighting terrorism and radicalism.