Iranian architecture speaks about history, wisdom, principles and incredible phenomena of spiritual arts. This architecture has had a great growth in Islamic ages in all aspects of with affiliated arts including art of plaster works. In total, the arts affiliated with the Iranian architecture, in particular the phenomenon of plaster works has been very regular, and decorating the inner part of units. In some cases, it has caused the beautification of the outer and inner housing faces such as houses at Qajar period in Kashan and other regions. This art has brought about the various images of Eslimi, Khatayea, scattered ivy and many other types of seven pens of script and its branches for Iranian and Islamic architecture. The result is that the innovative art of plaster work can be used both for beautification of today’s Islamic works and also the residential units. In summary, the art of plaster works with the combination of mirror works, has created another branch of this art. In total, the two arts of mirror work and plaster work in form of deep and highlighted and in some cases with colored mirrors, has given rise to a great philosophy and wisdom of beauty and aesthetic attraction for the works of Iranian and Islamic architecture. This study has been conducted based on historical analytical –descriptive method. The information has been obtained from the library studies and field observations and experiences.