In the vast part of Iran, water and water supply system have been one of the vital issues for generations. Hence, in many historic cities of Iran, there were precise water supply systems, whose study of evolution could be of great importance to Iranian studies' researchers. Qanats have a great contribution to the development of the cities in Iran, especially the desert cities. Kashan is one of the cities whose qanats and reservoirs have been mentioned in travel books and historical books. In the present paper, the status of Kashan pipelines and reservoirs in travel books, and their development and com-pletion in the course of history are explained. The present situation of these water supply systems, based on written sources, maps and sources of oral history is studied as well.
