The present invention provides a resource management method and system thereof. The resource management method includes: judging whether the variation degree of work state of a communication system will result in the change of resource management information of the communication system or not, if so, then the resource management information is re-collected, wherein the resource management information includes the state, the interference state among links and service stream information relating to each node in the communication system; and determining the resource allocation strategy of the communication system according to the resource management information.