The inscription is one of the elements that holds a special importance in Islamic architecture. It is an element that, in addition to its semantic aspect, can also enhance the visual and aesthetic beauty and grandeur of the architectural space. This has prompted Muslim artists to engage in the writing of inscriptions in the form of calligraphy, and in some cases accompanied by decorative motifs, in order to display and propagate the word of God and the great individual of religion, and to present a sacred space with spiritual and mystical attractions in mosques and holy places. Among the Islamic scripts, the sols script is one of the most important calligraphic items, which has been the focus of inscription artists from the Ilkhany period to the present day, due to its valuable visual capabilities and characteristics. This research focuses on the sols inscriptions located in the Hashti of the Mozzafari Mosque in Kerman, which are in the form of scrolls and cover the entire Hashti, in an effort to explain the general principles of visual and calligraphic rules used in the art of inscription, which is an important branch of the art of calligraphy , to examine the inscriptions in accordance with the principles and rules of the aforementioned technical and executive constraints. The findings of this study, which are descriptive-analytical, show in the writing of the Sols inscriptions ; Visual and qualitative principles such as the composition of the seat, balance and proportionality of the form of letters and their proximity to the inscription, the order and harmony of repetition and sequence in the relationships between the letters, whether in singularities and in connections, and in relation to other components of the inscription has been of attention by a calligrapher artist was aware of inscriptions techniques . In the meantime, the content of the inscription and the proportion of its concepts to the characteristics of the Hashti have increased the visual impact of Sols inscriptions in presenting a magnificent, subtle and spiritual space.