A method for managing two baseboard management controllers comprises connecting to a first baseboard management controller, sending an instruction to the first baseboard management controller, determining whether the instruction comprises a bridge parameter, when the instruction comprises the bridge parameter, sending the instruction to a second baseboard management controller through a bus, generating a response signal by the second baseboard management controller, and receiving the response signal by the first baseboard management controller and sending the response signal to an administration interface; otherwise, executing a corresponding operation according to the instruction by the first baseboard management controller and sending an operation result to the administration interface.