A network service information providing system which allows users to readily know a location and radio transmission parameters for connecting to a narrow-area wireless communications system in a system which contains wide-area wireless communications systems and narrow-area wireless communications systems. The user knows his/her own location through a wide-area wireless communications system and sends the location of a narrow-area wireless communications system which he/she wants to connect to, wireless transmission parameters, and other requirements to a wireless area information server. The wireless area information server possesses wireless transmission parameters of narrow-area wireless communications systems and the locations of base stations which provide narrow-area wireless communications services. Upon receiving the user requirements, the wireless area information server informs the user of the service area of the narrow-area wireless communications system nearest to the user via the wide-area wireless communications system.