In Islamic culture, "garden" is a manifestation of heaven in appearance, So the carpet and garden are the mirrors of heaven. In this research, the design patterns of Iranian garden and garden carpets in Safavid and Qajar period are identified and compared with each other. The goal of this research is to investigate the interactions of form, geometry and patterns of design in garden carpet and Iranian garden. In this research, the effects of the dominant elements and characcteristics such as architectural and natural elements, motifs, forms and design principles, in Isfahan “Chehelsoton” garden", Kashan "Fin” garden, Mahan "Shahzadeh” garden" and Shiraz "Jannat” garden" are surveyed and compared with 12 samples of garden carpets belonging to the 16th , 17th and 18 th centuries. The result of the research is that, the design of Iranian gardens and garden carpets have some principles in common, inspiring and affecting each other. Gardening pattern in "Fin" ," Shahzadeh" ,"Chehelsoton" and "Jannat” gardens are closely similar to each other. Based on the results of the research, the most indices of Iranian Gardens are found in "Fin" with 81.5 percent, "Chehelsoton" &,"Shahzadeh" with 74 percent and "Jannat" with 66.6 percent which accordingly have the most effects on garden carpet design patterns. Also, "Bage Behesht" carpet (carpet No. 3) has the most accordance and "Garden Rug" (carpet No. 12) has the least harmony with characteristics and indices of Iranian gardens.
