An information source selection system and an information source selection method for allowing a user to easily select an information source to which information is added at a frequency that matches the user's access frequency are provided. The method includes acquiring information on information addition frequency, which indicates frequency at which information is added per predetermined time period, for each of a plurality of recommendation candidate information sources contained in a plurality of information sources provided on a communication network, acquiring access frequency information that indicates frequency at which a user accesses one of the plurality of information sources provided on the communication network, and selecting, from the plurality of the recommendation candidate information sources, one or more recommendation candidate information sources that match the user based on the information on information addition frequency of each of the recommendation candidate information sources and the access frequency information of the user.