A device for transmitting Signaling Communication Network SCN information and Management Communication Network MCN information in an Automatic Switch Optical Network ASON, characterized by comprising: a control plane related processing unit, a SCN interface adaptation unit, a management plane related processing unit, a MCN interface adaptation unit, and Data Communication Network, DCN, interfaces; wherein the device further comprises a routing buffering module; the routing buffering module is configured to perform routing processing and buffering for received SCN information, which is generated by the control plane related processing unit and for which protocol and interface adaptation processing has been performed by the SCN interface adaptation unit, and received MCN information, which is generated by the management plane related processing unit and for which protocol and interface adaptation processing has been performed by the MCN interface adaptation unit, and to preferentially transmit the received SCN information to the DCN interfaces to be forwarded; wherein the routing buffering module comprises a routing processing unit and a buffer unit; and wherein: the routing processing unit is configured to receive SCN information and MCN information from the SCN interface adaptation unit and the MCN interface adaptation unit respectively, and to transmit the received SCN information and MCN information to the buffer unit via different physical channels or logical channels after performing routing processing for the received SCN information and MCN information; the buffer unit has priority sequencing and buffering functions, distinguishes received SCN information from received MCN information according to different physical or logical channels, performs priority sequencing and buffering for the received SCN information and MCN information, and preferentially transmits SCN information to the DCN interfaces to be forwarded. the routing buffering module is configured to perform routing processing and buffering for received SCN information, which is generated by the control plane related processing unit and for which protocol and interface adaptation processing has been performed by the SCN interface adaptation unit, and received MCN information, which is generated by the management plane related processing unit and for which protocol and interface adaptation processing has been performed by the MCN interface adaptation unit, and to preferentially transmit the received SCN information to the DCN interfaces to be forwarded; wherein the routing buffering module comprises a routing processing unit and a buffer unit; and wherein: the routing processing unit is configured to receive SCN information and MCN information from the SCN interface adaptation unit and the MCN interface adaptation unit respectively, and to transmit the received SCN information and MCN information to the buffer unit via different physical channels or logical channels after performing routing processing for the received SCN information and MCN information; the buffer unit has priority sequencing and buffering functions, distinguishes received SCN information from received MCN information according to different physical or logical channels, performs priority sequencing and buffering for the received SCN information and MCN information, and preferentially transmits SCN information to the DCN interfaces to be forwarded. the routing processing unit is configured to receive SCN information and MCN information from the SCN interface adaptation unit and the MCN interface adaptation unit respectively, and to transmit the received SCN information and MCN information to the buffer unit via different physical channels or logical channels after performing routing processing for the received SCN information and MCN information; the buffer unit has priority sequencing and buffering functions, distinguishes received SCN information from received MCN information according to different physical or logical channels, performs priority sequencing and buffering for the received SCN information and MCN information, and preferentially transmits SCN information to the DCN interfaces to be forwarded.