To produce electroplated steel sheets of various kinds of widths while maintaining coating weight distribution.

A narrow steel sheet narrower than a narrow electrode is plated by using a plurality of N-sets of narrow electrodes, and the coating weight in a steel sheet width-direction is measured and recorded at a plurality of measurement points from an edge. Similarly, wide steel sheets wider than the electrode are plated, and the coating weight in a steel sheet width-direction is measured and recorded to obtain the relationship between the distance to an end of the electrode and the coating weight. Then, on the basis of the relationship, the coating weight in the width direction is estimated by using N-sets of narrow electrodes, and similarly, the coating weight in the width direction is estimated by using N-sets of wide electrodes. Next, the coating weight is obtained by using N1-sets of narrow electrodes and N2-sets of wide electrodes (where, N2=N-N1) through the weighted average of the estimated values of the coating weight at each electrode width with the number of the electrode sets. Plating equipment is constructed by obtaining the adequate number of sets of the narrow electrodes and the wide electrodes based on the relationship between the number of sets of the narrow electrodes and the wide electrodes, and the coating weight. The plated steel sheet is produced using the equipment.