Disclosed is a method for transmitting location information about user equipment, used for determining the location of user equipment more accurately by the core network, benefitting operations such as accurate charging by the core network. The method includes: a control plane management device receiving location information reported by a relay node (RN), wherein the location information includes relevant information about the donor cell where the RN is located; and the control plane management device determining the location of UE according to the received location information, and sending the latest location information about the UE to a charging function node after the location of the UE has changed. Also disclosed is an implementing method for the charging function node side, and a device used for implementing these methods.