The invention discloses a water transport device with the environment sensing ability. The water transport device comprises a transport ship and a millimeter-wave radar three-dimensional environment sensing system installed on the transport ship. The millimeter-wave radar three-dimensional environment sensing system comprises millimeter-wave radar, a rotary mechanical device, a control unit and a data processing unit. The rotary mechanical device comprises a first rotary shaft, a rotary disc and a second rotary shaft. The water transport device is simple and practical in structure, the front position can be scanned and covered without a dead angle, and the water transport device has the beneficial effects of being accurate in control, high in locating accuracy, good in real-time performance and the like.