Provided is a smoothing-target-value calculation device that is capable of calculating a smoothing target value with which it is possible to suppress battery degradation. The present invention provides a smoothing-target-value calculation device that calculates a smoothing target value, which is a target value for the sum of first power generated by a renewable-energy power generation system and second power charged into and discharged from a battery, the smoothing-target-value calculation device including: a predicted-value acquisition unit that acquires a predicted value for the first power; a predicted-value correction unit that corrects the predicted value; and a smoothing-target-value calculation unit that calculates a smoothing target value by smoothing the corrected predicted value.