Abstract: A vessel mooring system for mooring a vessel to a mooring facility on a wharf by means of a plurality of mooring devices, which mooring devices incorporate tension detectors therein, whereby the vessel is moored to the mooring facility in a well balanced condition by adjusting the tensions exerted on the respective mooring devices by using tension signals issued from said tension detectors. The aforesaid plurality of mooring devices each consist of a dolphin or the like, a hook formed on the dolphin, groups of ropes and winches on board the vessel.