The remains of water transmission management systems for urbanization and on a wider scale for agriculture show the importance of water for the governments and residents of the Iranian plateau. In this arid and semi-arid land, there is little permanent water that can solve the problem of water for urban and agricultural use over a long period of time. It seems that the technology of using Qanat in dry and watery areas was the best solution to avoid water shortage and to cross the lowlands and heights of neighboring lands. The typology of this technology in the Sassanid and Islamic periods in the Fars region is one of the goals of this research. What were the measures of the Sasanians regarding the water supply and management system through digging well and Qanat? With the change in the political and religious systems, after the arrival of Islam in Iran, which changes occurred in the management of the water transmission systems through well and Qanat? These are the issues that the current research seeks to answer. The upcoming research deals with the methodology of digging well and Qanat in the Sassanid and Islamic periods with a historical-comparative-analytical approach and using library-field studies. The Sasanians valued water and its management through Qanat and used their own special method in its construction and with the arrival of Islam in Iran, this technology continued to exist in a different way.