The multifunctional underwater fishing detection robot can be used to capture marine products such as sea cucumber, conch, sea urchin, etc. It can also be used for observation of marine breeding bases and detection of dam bridges. The underwater robot is equipped with a full HD low-delay underwater dedicated network camera. The camera pan-tilt supports 180 large-angle rotation, integrates underwater high-dynamic large-range real-time high-definition panoramic imaging technology, and can clearly observe the underwater cruise area. Multi-axis large thrust design, flexible control, fixed depth hover, directional navigation, high anti-interference stability control navigation capability; Integrated USBL acoustic positioning system, can cruise according to a predetermined path, can be observed at fixed points; The waterproof depth is 200 meters, which can be easily deployed by one person. The hand-held ground station is designed to be easy to operate. It is also equipped with LED lighting, claws, altimeter, depth gauge and high brightness ground station, which can be used for daytime strong light operation. Handheld operation can also reduce vertigo on board.