He was the Mufti-e Azam or Grand Mufti of Bangladesh and was the Chief Mufti of Darul Uloom Hathazari for a long time. He established Jamia Islamia Hamius-Sunnah, an exceptional Islamic seminary.
Popularly known as Faqihul Millat, the father of Islamic banking system in Bangladesh. He was the first student of the Fatwa Department of Darul Uloom Deoband. He was widely known as the Mufti. His fatwas have been published in 12 volumes under the name of Fatwa-e Faqihul Millat. He established numerous mosques, madrasas and charities including Islamic Research Center Bangladesh.
Known as Shaykhul Islam, he was a revolutionary Islamic spiritual figure. He established Hefazat-e-Islam Bangladesh and carried out major reforms at the national level. The historic Shapla Chattar Movement was held under his leadership. He was also the President of Befaqul Madarisil Arabia Bangladesh and Rector of Darul Uloom Hathazari.
He is the Secretary General of Hefazat-e-Islam Bangladesh and International Majlis-e Tahaffuj-e Khatme Nabuwat Bangladesh, Chancellor and Shaykh al-Hadith of Al Jamiatul Islamia Makhjanul Uloom.