In a mobile phone, service searching means extracts a keyword(s) from program information regarding the program currently reproduced in the mobile phone, and searches a service registration database for all titles and addresses of message exchange system associated with the keyword(s). Menu displaying means displays a list of the acquired title(s) in a display. Further, the service searching means 53 receives data for causing the mobile phone to function as a terminal device of the message exchange system selected by the user, allowing the user to immediately access the message exchange system.