The multi-dimensional joint perception system for water surveillance is a comprehensive surveillance system for water areas, using surveillance radar, automatic identification of ships (AIS), optical video, and drones as the main means of perception. It has the functions of detecting, identifying, and tracking small targets in complex water environments, as well as radar-guided optical equipment tracking, photo-taking for evidence collection, and alarming.Using multi-dimensional data fusion, image recognition, and AI intelligent algorithm to identify illegal fishing, illegal harvesting, illegal sand mining, smuggling and illegal immigration, the system can automatically search for and discover, automatically alert, and automatically collect evidence.The system can be applied to fields such as smart fishery administration, smart fishing port, smart sand ban, smart coastal defense, offshore oil and gas fields, offshore wind power plants, and bridge collision prevention.