Using a memory that manages a user log including at least a cooking time and a food to be cooked with a cooking device used by each user in a plurality of users, a recommended cooking time corresponding to a first user's food to be cooked included in recommended cooking times for respective foods calculated based on cooking times with the cooking devices is acquired from a server, a user interface that prompts the first user to select one of candidates of cooking times including at least the recommended cooking times is displayed on a display, and in response to detecting that a cooking time is selected by performing an input operation on the user interface, a setting command to set the selected cooking time is output to the first cooking device.