A recommended action output system includes a communicator that obtains activity plan information including an activity plan of a user of a vehicle including a storage battery and electricity storage information including electricity storage capacity of the storage battery and an amount of electricity stored currently in the storage battery; a controller that obtains charger information including locations of vehicle chargers in a specific area; a predictor that predicts a change over time in electric power demand in the specific area; a determiner that determines a charging timing of the storage battery recommended to the user and a charging location indicating a location of a vehicle charger for charging the storage battery to reduce peak demand in the predicted change over time, based on the activity plan information, the electricity storage information, and the charger information; and a communicator that outputs recommendation information including the determined charging timing and location.