PROBLEM TO BE SOLVED: To make the prediction of a crop yield of a field crop, especially a short-term prediction of crop yield of the field crop. SOLUTION: This method for predicting a crop yield of a field crop comprises (a) steps (S01, S02) for calculating a first predicted crop yield of the field crop based on a cultivation plan of the field crop, (b) a step (S03) for calculating a correction value using a neural network and (c) a step (S04) for calculating a final predicted crop yield being the predicted crop yield in a prediction period of prediction target based on the first predicted crop yield and the correction value.
