A method for transmitting a relay link control channel, comprising: carrying control information and mapping a control channel which are performed in a subframe on a link from an Evolved Node B, eNode-B, to a relay node through a Frequency Division Multiplex, FDM, mode, wherein in the FDM mode, the control information of the link from the eNode-B to the relay node is carried by one or more resource blocks in a frequency direction and a universal set of Orthogonal Frequency Division Multiplexing, FDM, symbols available to a relay link in the subframe in a time direction, the OFDM symbols available to the relay link are all OFDM symbols except for OFDM symbols dedicated to the control information from the eNode-B to a User Equipment, UE, in the subframe; and the mapping of the control channel comprises mapping in the time direction and/or the frequency direction; wherein in the FDM mode, the control information of the link from the eNode-B to the relay node is carried by continuous or discrete resource blocks and the universal set of OFDM symbols available to a relay link in the subframe; and wherein the mapping of the control channel in the frequency direction is as follows: the control information of the link from the eNode-B to the relay node is carried in a control information carrying manner corresponding to continuous resource blocks and the universal set of OFDM symbols available to a relay link in the subframe; in this carrying manner, the eNode-B and the relay node determine quantity and positions of resource blocks used for carrying the control information of the link from the eNode-B to the relay node according to a cell identity, ID, in the system and the total quantity of the resource blocks, and the control information and information on quantity and positions of other resource blocks for carrying the control information of the link from the eNode-B to the relay node is carried by one or more of the determined resource blocks used for carrying the control information of the link from the eNode-B to the relay node; or the control information of the link from the eNode-B to the relay node is carried in a control information carrying manner corresponding to discrete resource blocks and the universal set of OFDM symbols available to a relay link in the subframe; in this carrying manner, the eNode-B and the relay node determine quantity and positions of resource blocks used for carrying the control information of the link from the eNode-B to the relay node according to the cell ID in the system and the total quantity of the resource blocks, and the control information and information on quantity and positions of other resource blocks for carrying the control information of the link from the eNode-B to the relay node is carried by ones corresponding to a subcarrier group mapped by a physical control format indicator channel, PCFICH, in the determined resource blocks used for carrying the control information of the link from the eNode-B to the relay node. the control information of the link from the eNode-B to the relay node is carried in a control information carrying manner corresponding to continuous resource blocks and the universal set of OFDM symbols available to a relay link in the subframe; in this carrying manner, the eNode-B and the relay node determine quantity and positions of resource blocks used for carrying the control information of the link from the eNode-B to the relay node according to a cell identity, ID, in the system and the total quantity of the resource blocks, and the control information and information on quantity and positions of other resource blocks for carrying the control information of the link from the eNode-B to the relay node is carried by one or more of the determined resource blocks used for carrying the control information of the link from the eNode-B to the relay node;