Delay correction method, device and system

A delay correction method, device and system are provided in the present invention. The delay correction device includes: a first transceiver interface, used for communicating with a transceiver; a second transceiver interface, used for communicating with an antenna group; and a radio frequency unit, used for coupling a first radio frequency signal, which is transmitted from any one of transmission channels of the transceiver and received by the first transceiver interface, to the second transceiver interface, so that the first radio frequency signal is transmitted to the antenna group via the second transceiver interface; and used for mixing the first radio frequency signal returned from the antenna group and received by the second transceiver interface, and coupling an obtained second radio frequency signal to the first transceiver interface, so that the second radio frequency signal is transmitted to at least two reception channels of the transceiver separately via the first transceiver interface. The embodiment of the present invention improves the accuracy of the obtained delay of at least two reception channels or at least two transmission channels, increases the delay correction precision, and meets the delay error requirement of closed loop MIMO.