Charging information managing apparatus

An IP address recognizing unit determines whether or not an IP address of a mobile IP terminal whose charging information is to be processed is managed by a local station. If the IP address is not managed, a MobileIP-Server searching unit determines which station is the home station of the IP address. Then, a different station information transmission determining unit and a different station IP charging apparatus transmitting unit transmit the charging information to the apparatus that is a different station IP charging apparatus and the home station of the IP address. Additionally, a different station IP charging apparatus receiving unit receives the charging information of the IP address, and stores the charging information in a charging information database (for different station transmission) and manages the charging information.