A learned model is created by learning reference data that includes site data for reference photovoltaic power generation facilities, panel layout data including data on installation angles of reference photovoltaic panels, panel specifications data, sun direction data, weather data, and power generation data. A design support apparatus calculates a cumulative amount of power generation for a predetermined period by processing, for each of a plurality of pieces of provisional panel layout data on photovoltaic panels having different installation angles from each other, the relevant piece of the provisional panel layout data and input data, by the learned model, and extracts a piece of the provisional panel layout data in which the cumulative amount of power generation is maximum.