An uplink control information transmission method, comprising: receiving, by user equipment, UE, in a downlink subframe N, a downlink control channel sent by a base station, wherein the downlink control channel is carried on a first serving cell of the UE; and sending, by the UE, a hybrid automatic repeat request-acknowledgement corresponding to the downlink control channel to the base station in an uplink subframe N+4 by using a physical uplink control channel, PUCCH, wherein when the uplink subframe N+4 belongs to a first uplink subframe set, the PUCCH is carried on a second serving cell of the UE, and when the uplink subframe N+4 belongs to a second uplink subframe set, the PUCCH is carried on the first serving cell, wherein a duplexing mode of the first serving cell is different from a duplexing mode of the second serving cell, the sum of a quantity of uplink subframes comprised in the first uplink subframe set and a quantity of uplink subframes comprised in the second uplink subframe set is equal to a quantity of subframes in a radio frame, and an uplink subframe comprised in the first uplink subframe set and an uplink subframe comprised in the second uplink subframe set correspond to different subframes in the radio frame; before the sending, by the UE, a hybrid automatic repeat request-acknowledgement corresponding to the downlink control channel to the base station in an uplink subframe N+4 by using a PUCCH, the method further comprises: acquiring, by the UE, a PUCCH resource and/or a PUCCH transmit power of the PUCCH; wherein when the uplink subframe N+4 belongs to the first uplink subframe set, the acquiring, by the UE, a PUCCH resource of the PUCCH comprises: determining, by the UE, the PUCCH resource according to a transmit power control, TPC, command field in a downlink control information, DCI, format of the downlink control channel; wherein when the uplink subframe N+4 belongs to the second uplink subframe set, the acquiring, by the UE, a PUCCH transmit power of the PUCCH comprises: determining, by the UE, the PUCCH transmit power according to a TPC command field in a DCI format of the downlink control channel. receiving, by user equipment, UE, in a downlink subframe N, a downlink control channel sent by a base station, wherein the downlink control channel is carried on a first serving cell of the UE; and sending, by the UE, a hybrid automatic repeat request-acknowledgement corresponding to the downlink control channel to the base station in an uplink subframe N+4 by using a physical uplink control channel, PUCCH, wherein when the uplink subframe N+4 belongs to a first uplink subframe set, the PUCCH is carried on a second serving cell of the UE, and when the uplink subframe N+4 belongs to a second uplink subframe set, the PUCCH is carried on the first serving cell, wherein a duplexing mode of the first serving cell is different from a duplexing mode of the second serving cell, the sum of a quantity of uplink subframes comprised in the first uplink subframe set and a quantity of uplink subframes comprised in the second uplink subframe set is equal to a quantity of subframes in a radio frame, and an uplink subframe comprised in the first uplink subframe set and an uplink subframe comprised in the second uplink subframe set correspond to different subframes in the radio frame; before the sending, by the UE, a hybrid automatic repeat request-acknowledgement corresponding to the downlink control channel to the base station in an uplink subframe N+4 by using a PUCCH, the method further comprises: acquiring, by the UE, a PUCCH resource and/or a PUCCH transmit power of the PUCCH; wherein when the uplink subframe N+4 belongs to the first uplink subframe set, the acquiring, by the UE, a PUCCH resource of the PUCCH comprises: determining, by the UE, the PUCCH resource according to a transmit power control, TPC, command field in a downlink control information, DCI, format of the downlink control channel; wherein when the uplink subframe N+4 belongs to the second uplink subframe set, the acquiring, by the UE, a PUCCH transmit power of the PUCCH comprises: determining, by the UE, the PUCCH transmit power according to a TPC command field in a DCI format of the downlink control channel. acquiring, by the UE, a PUCCH resource and/or a PUCCH transmit power of the PUCCH; wherein when the uplink subframe N+4 belongs to the first uplink subframe set, the acquiring, by the UE, a PUCCH resource of the PUCCH comprises: determining, by the UE, the PUCCH resource according to a transmit power control, TPC, command field in a downlink control information, DCI, format of the downlink control channel; wherein when the uplink subframe N+4 belongs to the second uplink subframe set, the acquiring, by the UE, a PUCCH transmit power of the PUCCH comprises: determining, by the UE, the PUCCH transmit power according to a TPC command field in a DCI format of the downlink control channel. determining, by the UE, the PUCCH resource according to a transmit power control, TPC, command field in a downlink control information, DCI, format of the downlink control channel; wherein when the uplink subframe N+4 belongs to the second uplink subframe set, the acquiring, by the UE, a PUCCH transmit power of the PUCCH comprises: determining, by the UE, the PUCCH transmit power according to a TPC command field in a DCI format of the downlink control channel.