Steel association method, system, equipment and medium

The invention provides a steel correlation method, system and device and a medium, and the method comprises the steps: obtaining a steel sales contract image through photographing a steel sales contract, carrying out the optical character recognition of the steel sales contract image, and extracting steel specification characters in the steel sales contract image; matching redundant steel conforming to the steel specification characters from the redundant steel pool, and recording the redundant steel as intermediate steel; the delivery state and tolerance of the intermediate steel are compared, and the intermediate steel meeting the conditions is screened out to serve as target steel; and finally associating the target steel with the steel sales contract. According to the method, the redundant steel can be searched through the steel sales contract, and the steel sales contract can also be searched through the redundant steel, so that the redundant steel is associated with the steel sales contract, the redunda