Abstract: The maritime safety supervision such as patrol and emergency disposal has the characteristics of broad regulatory waters, rapid emergency response demand, high rescue capacity demand etc. Because of excellent autonomy, and intelligence, fast speed, strong risk resistance capacity and other advantages of Unmanned Surface Vehicle(USV), it is necessary to carry out a study on the application of the USV to the maritime safety supervision. Based on a brief description of the development and main functions of the USV, the characteristic of the maritime safety supervision is analyzed and the potential applications of the USV are demonstrated. The results show that the USV has many advantages such as low composite cost, strong risk resistance capacity, high degree of intelligence, rapid emergence response, etc, meeting the demands of the maritime safety supervision. As a conclusion, the USV is suitable for a wide range of applications to the maritime safety supervision.