An information sharing method that provides a graphical user interface image for sharing information relating to an appliance within a home among a plurality of users includes a receiving step of receiving, as home appliance event information, information on a state change of an appliance within a plurality of homes, a priority determining step of determining a priority of a home that is to be displayed in the graphical user interface image in accordance with an occurrence frequency of the home appliance event information within each home, and a home determining step of determining a home to be displayed in the graphical user interface image in accordance with the priority.