Beauty and value of Islamic art is somewhat depended on its metal working and decoration. Since the Iranian art is based on decoration, inscription on metal objects, is one of the main elements of decoration. Decoration of metal working in Safavid period and then in Qajar period, is an understanding between art and religion which would be seen only in intellectual and artistic ingenuity of Iranians which is found in remained works during historic periods. Among the religious themes in metal inscriptions, Imam Ali's (peace be upon him) name next to Allah, Mohammad, also prayers in eulogy of 12Imams are the themes which shows sincerely for Imam and is the manifest of Iranians' tendency for Shiism. Purposes: Study of differences and similarities of typography of Imam Ali (peace be upon him) in themes of metal working in Safavid and Qajar period. Study of political, cultural and artistic situation in discussed periods and the usage of Shiite themes. Questions: In which themes,Imam Ali's holy name is appeared in metal working art? What are the differences and similarities between the types of the themes in Qajar and Safavid period? Research method : Descriptive and analytical and historical