Method for controlling channel mapping and method and device for controlling channel detection

The embodiment of the invention relates to a method for controlling channel mapping and a method and a device for controlling channel detection. The method for controlling the channel mapping comprises the following steps of: determining a corresponding search space for at least two control channels with the same signaling length according to the signaling length of the control channels corresponding to member carriers based on the same aggregation level, wherein the at least two control channels with the same signaling length use the same search space; mapping the at least two control channels with the same signaling length to the determined corresponding search space; and/or, determining corresponding search spaces for at least two control channels with different signaling lengths respectively, wherein the at least two control channels with different signaling lengths use different search spaces in at least one time transmission unit; and mapping the at least two control channels with different signaling lengths to the determined corresponding search spaces respectively. Through the embodiment of the invention, not only the conflict of the control channels can be reduced, but also the blind detection times of the control channels can be reduced.