In recent years,with the rapid development of information technology and artificial intelligence,the intelligence of unmanned surface vessels(USV)has been steadily increasing,and the application of USV in maritime supervision has gradually entered into the exploration stage.In response to the new requirements of land,sea,air and space integrated water transport safety guarantee system proposed by the Maritime Safety Administration of the Ministry of Transport,this paper proposes a system architecture of land,sea,air and space integrated intelligent supervision system with USV as the core platform,elaborates the specific functions of each module of the system and the realization scheme.It also discusses the application scenarios and advantages in maritime supervision.