The method includes steps: building coincidence relation between service attribute and charging rule; capturing attribute of service to be charged before carrying out charging operation; capturing charging rule based on service attribute; carrying out charging process based on captured charging rule. The invention also discloses a charging system including module for capturing charging rule and module for charging processing. Providing information of service for module of charging process can meet the need of new developed service or for modifying original service. Thus, the module of charging process in charging system is not dependent on service so as to reduce cost of charging system and raise stability, reliability and versatility of charging system.