Abu 'Abdullah Sheikh 'Abdul-'Azeez ibn 'Abdullah ibn 'Abdur-Rahmaan Aal-Baaz was born in the city of Riyadh in Dhul-Hijjah 1330 A.H./1909 C.E.
He memorized the Quran in his early age and then he acquired knowledge from many of the great scholars of the Kingdom. Some of his teachers were Sheikh Muhammad ibn 'Abdul-Lateef Aal-Shaykh, Sheikh Saalih ibn 'Abdul-'Azeez Aal-Shaykh and the eminent Sheikh Muhammad ibn Ibraaheem Aal-Shaykh who, in his time, was the Muftee of Saudi Arabia. Sheikh Ibn Baaz accompanied the eminent Sheikh and learned from him for about ten years. Thus he gained his religious education from the family of Imaam Muhammad ibn 'Abdul-Wahhaab.
Afterwards Sheikh Ibn Baaz was appointed as a Justice and he worked for fourteen years in the judiciary until he was deputed to the education faculty. He remained engaged in teaching for nine years at Riyadh Islamic Law College, Riyadh Religious Institute. Then he was appointed Vice-Chancellor of the Islamic University, al-Madeenah; but shortly afterwards, he was made the Chancellor with all the administrative powers. Later he was appointed President of the General Presidency of Islamic Research, Ifta, Call and Propagation, Kingdom of Saudi Arabia.
He held the position of Grand Muftee of Saudi Arabia, the Presidency of many Islamic Committees and Councils, the prominent among these being: Senior Scholars Committee of the Kingdom, Permanent Committee for Islamic Research and Fataawa, the Founding Committee of Muslim World League, World Supreme Council for Mosques, Islamic Jurisprudence Assembly Makkah; and the member of the Supreme Council of the Islamic University at al-Madeenah, and the Supreme Committee for Islamic Propagation, until he passed away on Thursday 27 Muharram 1420 A.H./May 13 1999 C.E.