Hassan Ayat Iranian Revolution but resigned from the party. Ayat joined the Islamic Republican Party and became a member of its central committee. He was elected as a member of Assembly of Experts for Constitution in Constitutional Convention election. After that, Ayat was elected as a member of Parliament from Tehran. He was one of the main leaders in impeachment of President Abulhassan Banisadr. He was opposed to the election of Mir-Hossein Mousavi as prime minister because he believed that Mir-Hossein Mousavi was a freemasonry agent who had penetrated in the political structure of the Islamic Republic of Iran to attempt the
Mir-Hossein Mousavi in Shiraz, "Haft-e-tir Martyr's tomb" in Tehran's Behesht-e Zahra, and "Salman mosque" in the presidential residence are examples of his work. In recent years, he has been more active in painting and has participated in many exhibitions. Mousavi refused to run for the presidency in the 1997 elections, which caused the reformists to turn to his former Cabinet Minister, then a little-known cleric, Mohammad Khatami, who was elected by a landslide. During Khatami's administration, Mousavi served as the Senior Adviser to the President. Mousavi was considered the leading candidate from the reformist alliance to run in the Iranian presidential election,