The invention relates to a ship monitoring method, device and system, and a storage medium. The method comprises the following steps: acquiring state information of ship-borne equipment sent by acquisition equipment, wherein the acquisition equipment is used for receiving source information of ship-borne equipment acquired by a plurality of sensors, and the state information is obtained from the source information; determining a data processing mode corresponding to the acquisition equipment; performing data processing on the state information of the acquisition equipment by adopting the dataprocessing mode to obtain a state representation value of the ship-borne equipment; obtaining a state representation value of the ship according to the state representation value of the ship-borne equipment; and comparing the state representation value of the ship with a preset alarm threshold value, and sending prompt information to a monitoring center corresponding to the ship according to a comparison result. By adopting the method, the influence of external environment and subjective factors can be avoided, and the monitoring result is accurate; A real-time monitoring of the working stateof a ship is realized, the timely maintenance of the ship is facilitated, and the efficiency is high.