To provide a method for saving mobile set information to a secure place without losing the portability of a mobile set even in the case of saving/ restoring the mobile set information stored in a portable phone in an update enable way.

A portable phone MS transfers an upload instruction including a telephone number to specify the portable phone MS capable of mobile communication and mobile set information being information stored in an SRAM 163 of the portable phone MS to a mobile packet communication network MPN, which specifies a storage address being a storage address corresponding to the telephone number and overwrites the mobile set information to the storage address as storage information. Then the packet communication network MPN transmits a catalog including an update data of the overwritten storage information to the portable phone MS so that the portable phone MS can confirm the update of the storage information.