A relay method of a transport bearer, comprising: receiving (A201, A301) information encapsulated by a source device and sent by the source device; decapsulating (A202, A302) the received information encapsulated by the source device; encapsulating (A203, A303) the decapsulated information; and sending (A204, A304) the encapsulated information to a host device, wherein the receiving the information encapsulated by the source device and sent by the source device comprises: receiving (A201, A301) a signaling message or data, wherein the signaling message or data is encapsulated by the source device and sent by the source device; the decapsulating (A202, A302) the received information encapsulated by the source device comprises: parsing (A202, A302) the received signaling message or data, wherein the received signaling message or data is encapsulated by the source device; the encapsulating the decapsulated information comprises: performing (A203, A303) signaling bearer address replacement on the parsed signaling message, or performing (A203, A303) data bearer address replacement on the parsed data; and the sending (A204, A304) the encapsulated information to the host device comprises: sending (A204, A304) the signaling message after the signaling bearer address replacement to the host device, or sending (A204, A304) the data after the data bearer address replacement to the host device. receiving (A201, A301) information encapsulated by a source device and sent by the source device; decapsulating (A202, A302) the received information encapsulated by the source device; encapsulating (A203, A303) the decapsulated information; and sending (A204, A304) the encapsulated information to a host device, wherein the receiving the information encapsulated by the source device and sent by the source device comprises: receiving (A201, A301) a signaling message or data, wherein the signaling message or data is encapsulated by the source device and sent by the source device; the decapsulating (A202, A302) the received information encapsulated by the source device comprises: parsing (A202, A302) the received signaling message or data, wherein the received signaling message or data is encapsulated by the source device; the encapsulating the decapsulated information comprises: performing (A203, A303) signaling bearer address replacement on the parsed signaling message, or performing (A203, A303) data bearer address replacement on the parsed data; and the sending (A204, A304) the encapsulated information to the host device comprises: sending (A204, A304) the signaling message after the signaling bearer address replacement to the host device, or sending (A204, A304) the data after the data bearer address replacement to the host device. parsing (A202, A302) the received signaling message or data, wherein the received signaling message or data is encapsulated by the source device; the encapsulating the decapsulated information comprises: performing (A203, A303) signaling bearer address replacement on the parsed signaling message, or performing (A203, A303) data bearer address replacement on the parsed data; and the sending (A204, A304) the encapsulated information to the host device comprises: sending (A204, A304) the signaling message after the signaling bearer address replacement to the host device, or sending (A204, A304) the data after the data bearer address replacement to the host device.