The present invention relates to the field of communications technologies. A resource management method, apparatus, and system in a multi-carrier system are disclosed. The multi-carrier system includes at least one multi-carrier cell and the multi-carrier cell includes at least two single carrier establishing cooperation. The method includes the following steps: A base station measures the cooperative resource usage information of each cooperation established single carrier cell; the base station reports the cooperative resource usage information to a radio network controller for the radio network controller to perform resource management. The information measured and reported by the base station in the embodiment of the present invention can satisfy the needs of the multi-carrier performing resource management and make sure that the radio network controller can perform reasonable admission control over multi-carrier UEs.