To support selection of a communication system of a network applied to an FA system of a user, a network selection supporting method according to an embodiment of the present invention includes a condition displaying step of displaying, on a condition input screen, one or a plurality of selection conditions set in advance related to the communication system of the network applied to the FA system, a condition receiving step of receiving an input of a selection condition desired by the user among the selection conditions displayed on the condition input screen, a communication system searching step of searching through a communication system database and finding a communication system matching the input selection condition, and a communication system list displaying step of displaying a search result of the communication system on the communication system list display screen as a list.