Problem to be solved: to provide a model learning method, a method of changing a running plate thickness, a method of manufacturing a steel plate, a model learning device, a running plate thickness changing device and a steel plate manufacturing apparatus capable of performing a high accuracy of a change in the thickness of a running plate during continuous cold rolling by a cold rolling mill.The model learning method is based on the results of the cold rolling process in which the steel plate is welded with different conditions and continuously rolled by the cold rolling machine composed of two or more continuous rolling stands, and the result data of the previous step of the cold rolling process is input data. A learning model is generated by machine learning using rolling load of each rolling stand of a cold rolling mill as output data.Diagram
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