Method for reporting flow and device

The embodiment of the invention provides a method for reporting flow and a device thereof. The method comprises a step of receiving the first flow information of a user by a policy and charging enforcement and function (PCEF), and a step of sending second flow information to an online charging system (OCS) according to the first flow information such that the OCS carries out online flow charging on the user according to the second flow information. According to the method for reporting flow and the device of the embodiment of the invention, through a policy and charging rules and function (PCRF), according to the user first flow information sent by the PCEF, the sending second flow information is sent to the OCS, the OCS carries out online flow charging on the user according to the second flow information, the processing burden of the interface of the OCS for direct information exchange with the PCEF can be reduced effectively, and the problem of OCS and PCRF flow accumulation inconsistency caused by that the PCEF sends the user flow information to the OCS and the PCRF at the same time can be effectively avoided at the same time.