The present invention discloses a charging network, including: a service unit, a charging system and a charging agent apparatus; the charging agent apparatus is responsible for connecting the service unit and the charging system, receiving a charging event sent from a service unit, determining a corresponding charging system and generating a charging request according to the information carried in the charging event, and sending the generated charging request to the corresponding charging system. Also, a charging agent apparatus and a charging method are provided by this invention. The charging agent apparatus is added into the charging network, responsible for interacting with service units and charging systems, thus reducing the complexity of the service units as well as the charging network.