The invention relates to a charge method of intelligent call and relative system. Wherein, said method is characterized in that: SCP obtains the information of relay media gateway TMG or usual media gateway UMG relative to the intelligent call; and according to said information to fix the time zone of calling initiator; then according to the time zone, processes charge treatment. The invention canovercome the defects of present techniques, while it can fix the time zone of calling initiator accurately, to process charge treatment on the call of intelligent user, to effectively charge in multitime zones and NGN network mode.