The invention relates to a state prediction method and device for a ship engine bearing box and a computer device, and belongs to the technical field of ship engine monitoring. The method comprises the following steps: acquiring bearing box monitoring data; wherein the bearing box monitoring data is determined according to the acquired data, sent by the acquisition equipment, of the ship engine bearing box; acquiring state evaluation data of the ship machine bearing box; wherein the state evaluation data is determined according to fault characteristics of the ship machine bearing box; and comparing the monitoring data of the bearing box with the state evaluation data, and determining a state prediction result of the ship engine bearing box according to a comparison result. According to thetechnical scheme, the problems that the state prediction method of the ship machine bearing box is easily influenced by the external environment and subjective factors, and the result is often inaccurate are solved. The state prediction result of the ship engine bearing box can be automatically determined, and the state prediction accuracy of the ship engine bearing box is effectively improved.