For acquiring the basic targets of marine area and seabed and human-designed targets, and carrying out feature capture, interpretation and identification, research on submarine detection system. Use Beidou location function to deploy submarine robot with specific detection sensor in reserve sea area. A detect network matrix is formed based on principle, depending on different sensors data of waters hydrology and geomorphology, passing vessels, fishery resources, sea minerals is achieved by offline or online, and data is dealt with Kalman filtering and transmitted to the control center. Through big data analysis and data mining, carry out situational interpretation, data comparison and target recognition, monitor situations of current sea surface or underwater navigation, fisheries, hydrological, mineral. The visual simulation results show that the system work process and data processing mode can meet the requirements of data acquisition, processing and work, which provides data support for the long-term situation analysis of the sea area.