Shahnameh is the most valuable literary collection in the history of Iranian literature, which has always been a very effective source of the growth and prosperity of Iranian painting. As a result, Shahnameh's writing has always been at the top of the attention of kings, courtiers, and art lovers. The growth path of Iranian painting can be seen in the middle periods. Painters always tried to depict the relevant pictures with seriousness and precision based on the most important poems of the Shahnameh in terms of events and incidents. From the Ilkhanid period to the Safavid period, Iranian painting had the peak of creativity and innovation in composition, coloring, and design. The painter of these pictures has always tried to do justice to the subject to show feelings, emotions, and emotions after choosing epic poems, wars, and celebrations. The Shahnameh of Shah Tahmasab can be considered a perfect choice for examining paintings in terms of expressiveness and excitement in the path of maturity and expression of these periods. While investigating the factors of the formation of expressive aspects of painting, to understand and identifying the expressive or expressive aspects in Iranian painting, this research sought to answer the question, in which period were the most expressive elements and concepts? And basically, in which part (theme, design, or color) did the expressive features appear? Since poems related to that image have been used in these images, these images can be considered a kind of illustration of a literary text. The results got from this research showed, on the one hand, the influence of the paintings of the periods before Tabriz II in the paintings of the painters of the Shahnameh of Shah Tahmasb. It showed the maturity of the paintings in expression and excitement.