In the field of mobile communication, a method, device, and system for configuring multicast broadcast single frequency network (MBSFN) resources are provided, so as to solve the problem that configuration information of each radio network controller (RNC) in an MBSFN cannot be dynamically synchronized. With the coordination of a master RNC, a multimedia broadcast multicast service (MBMS) configuration information message is transferred through IUR interface connection, and MBMS configuration information of the master RNC and each slave RNC is synchronized. In this way, the problem that configuration information of each RNC in an MBSFN cannot be dynamically synchronized is solved, thereby satisfying the demands of soft combing and air interface combining.