Abstract: It is a problem to provide a system allowing an addressee to set the RBT of an addresser. The tone information providing system has a receiving section for receiving calling information which is transmitted from a mobile phone used by a user and which includes an addresser number for specifying the mobile phone and an addressee number for specifying the mobile phone of a calling destination, a tone information selecting section for selecting tone information corresponding to the addressee number out of tone information stored in a tone information storing section in which an addressee number and tone information are related each other and stored, a transmitting section for transmitting the selected tone information to a mobile phone, and tone information recording section for relating an addresser number, addressee number and tone information each other to store them in a past-record information storing section.