Operation index presentation device, operation index presentation method, and program

To enable forecast of a future operation of a plant. A demand prediction unit predicts a time series of demand values related to a prescribed prediction period by using a prediction model. The prediction model is a learned model having learned to output a demand value of an energy source by being input an operation plan value of the plant and a prediction value related to an environment of the plant. An optimization unit specifies a plant operation index which, with respect to each of time points of the time series of the predicted demand values, satisfies the plurality of demand values and satisfies the desired condition. A presentation unit presents information related to the time series of the operation indexes over the prediction period.