The present invention pertains to a marine cultivation system for operating and managing a sensor without cleaning, the system being capable of monitoring water quality of an aquafarm through real-time monitoring of a water quality measurement sensor and periodically cleaning a fresh water and seawater sensor and a connection cable in seawater and fresh water, such that the sensor and the cable are cleaned to remove, therefrom, various floating matter, barnacles, and the like appearing in the seawater, and thus maintenance costs are reduced by the replacement of the sensor and the cable, separate human resources can be reduced by sensor maintenance, and the seawater can be easily measured by preventing sensor contamination. The present invention provides effects of enabling marine life appearing in the seawater to be suppressed from proliferating by putting the same into the fresh water and of enabling marine life appearing in the fresh water to be suppressed from proliferating by putting the same into the seawater, since an operation unit is inputted only when water quality information is measured, so as to put a seawater sensor for measuring a marine environment into the seawater, and periodically putting the seawater sensor into the fresh water during normal times .Linvention concerne un système de culture marine permettant lutilisation et la gestion dun capteur sans nettoyage, ledit système pouvant surveiller la qualité de leau dune ferme aquacole par la surveillance en temps réel dun capteur de mesure de qualité deau et le nettoyage régulier dun capteur deau douce et deau de mer et dun câble de raccordement dans leau de mer et leau douce, de sorte que le capteur et le câble soient nettoyés pour que soient éliminés de ceux-ci diverses matières flottantes, les anatifes et analogues, présents dans leau de mer. Ainsi, les coûts dentretien sont réduits par le remplacement du capteur et du câble, ces ressources humaines distinctes peuvent être également être réduites
