Charging strategy obtaining method and device

The embodiment of the invention discloses a charging strategy obtaining method and device, so that a broadband network gateway can obtain a correct charging strategy. The charging policy acquisition method can be applied to a broadband network gateway, and specifically comprises the following steps: receiving an authentication, authentication and charging request from user equipment, the authentication, authentication and charging request comprising a user name and an identifier of the user equipment; a charging strategy request is sent to the first server, the charging strategy request comprises a first field and a second field, the first field is used for carrying the user name, and the second field is used for carrying the identifier of the user equipment; and receiving a charging policy response sent by the first server, the charging policy response comprising a charging policy corresponding to the user name and the identifier of the user equipment, and obtaining the charging policy from the charging poli