Teleworking in Iran is one of the most important manifestations of spiritual and mystic concepts in art, which plays the main pillar in the decoration of mosques and religious places. The technical and artistic principles in the decorations, particularly the tiles, were of great interest. The purpose of this research is to compare Imamzadeh Mahrouq and Goharshad Mosque in terms of the type and decoration of tiles in order to determine the prominent effect in these two buildings considering that they were done in a historical period and a geographical area. In this research, with the documentary studies, we have seen that the type of tiling in the Goharshad Mosque and Imamzadeh Mahrouq building is the same, and the tiles are different depending on the space used and their role. In addition, the colours used differ. Maaqli tiles and seven-colour tiles are more common than other types of tiles in both locations because they save time for building renovations and restoration. The mosque of Goharshad is very important and prominent with respect to the extent and age of the tiles and its proximity to the courtyard of the 8th Imam.