Embodiments of the present invention disclose a method and apparatus for processing a cluster in a cluster system, and a cluster system, relate to the field of communications technologies, and are invented for effectively simplifying a cluster system. The method includes: sending, by switched fabric board of a member device, a request answer signal for requesting a main control board that receives the request answer signal to answer the request answer signal; and if the switched fabric board do not receive an answer signal of the request answer signal, sending, by the switched fabric board, an address of a main monitoring module to a main control board of a main device. The present invention may be applied to a clustering technology.