A charging method for a Wi-Fi-LTE converged network, comprising: obtaining, by a radio access device located in an access network, first information, wherein the first information comprises or is used to indicate a type of service data borne on a radio interface of the radio access device and a type of the radio interface; and sending, by the radio access device, the first information to a charging network element located in an LTE core network, so that the charging network element performs charging by using the first information; characterized in that the obtaining, by a radio access device located in an access network, first information comprises: determining, by the radio access device, whether the radio interface bears service data; if the radio interface bears service data, obtaining, by the radio access device, the first information; and wherein the sending, by the radio access device, the first information to a charging network element located in a core network comprises: forwarding, by the radio access device, the first information to the charging network element through a mobility management entity MME; wherein the type of the radio interface specifically comprises a wireless fidelity Wi-Fi radio interface type or a long term evolution LTE radio interface type; and wherein the performing, by the charging network element, charging by using the first information comprises: sending, by the charging network element, the first information to a gateway located in the core network, and receiving traffic information of the service data, wherein the traffic information is measured by the gateway according to the first information; and performing, by the charging network element, charging according to the traffic information. obtaining, by a radio access device located in an access network, first information, wherein the first information comprises or is used to indicate a type of service data borne on a radio interface of the radio access device and a type of the radio interface; and sending, by the radio access device, the first information to a charging network element located in an LTE core network, so that the charging network element performs charging by using the first information; characterized in that the obtaining, by a radio access device located in an access network, first information comprises: determining, by the radio access device, whether the radio interface bears service data; if the radio interface bears service data, obtaining, by the radio access device, the first information; and determining, by the radio access device, whether the radio interface bears service data; if the radio interface bears service data, obtaining, by the radio access device, the first information; and wherein the sending, by the radio access device, the first information to a charging network element located in a core network comprises: forwarding, by the radio access device, the first information to the charging network element through a mobility management entity MME; wherein the type of the radio interface specifically comprises a wireless fidelity Wi-Fi radio interface type or a long term evolution LTE radio interface type; and forwarding, by the radio access device, the first information to the charging network element through a mobility management entity MME; wherein the type of the radio interface specifically comprises a wireless fidelity Wi-Fi radio interface type or a long term evolution LTE radio interface type; and wherein the performing, by the charging network element, charging by using the first information comprises: sending, by the charging network element, the first information to a gateway located in the core network, and receiving traffic information of the service data, wherein the traffic information is measured by the gateway according to the first information; and performing, by the charging network element, charging according to the traffic information. sending, by the charging network element, the first information to a gateway located in the core network, and receiving traffic information of the service data, wherein the traffic information is measured by the gateway according to the first information; and performing, by the charging network element, charging according to the traffic information.