The utility model provides a pleasure -boat with safety coefficient, it can monitor the pleasure -boat surrounding environment and send the safety coefficient of early warning to the obstacle by the multidimension degree on the pleasure -boat to relate to one kind to whether provide safety signal's pleasure -boat can be constantly for long -range crewman, this pleasure -boat includes bow, stern, hull and sets up engine cabin and the cockpit in the hull, the pleasure -boat still including safety coefficient, safety coefficient including setting up taking lens on the pleasure -boat, image processing unit, image display unit, detective unit module, control unit module, taking lens set up in the periphery of pleasure -boat with detective unit module, taking lens, detective unit module link toeach other with the image processing unit respectively, the image processing unit link to each other with image display unit and control unit module respectively, continuous mode be the electricity and connect, the control unit can transmit the signal result of image processing unit to the image display unit, the image display unit set up at cockpit.