An uplink control channel sending method in a 3GPP system, implemented by a terminal device, comprising: receiving downlink data from a network device in each subframe in a first subframe set, wherein the first subframe set comprises N subframes, and each of the N subframes is a downlink full subframe, or M of the N subframes are downlink partial subframes, and N-M of the N subframes are downlink full subframes, wherein M is less than or equal to N, and both M and N are integers, wherein the downlink full subframe is a subframe in which the downlink data occupies all symbols in the subframe, and the downlink partial subframe is a subframe in which the downlink data occupies part of symbols in the subframe; and wherein the first subframe set is transmitted on a plurality of carriers using carrier aggregation, obtaining first downlink control information from the network device, the first downlink control information comprises first indication information; and the first indication information may be either first or second information; and when the first indication information is first information, sending a target physical uplink control channel in a first uplink subframe according to an indication of the first downlink control information, wherein the target physical uplink control channel comprises first uplink control information, and the first uplink control information comprises hybrid automatic repeat request acknowledgement information corresponding to the downlink data that is in each subframe in the first subframe set and that is received by the terminal device; wherein the first downlink control information comprises second indication information, the second indication information indicates a first power adjustment value; the method further comprising: adjusting transmit power of the target physical uplink control channel by the first power adjustment value; the transmit power of the target physical uplink control channel being further adjusted by a power adjustment amount corresponding to a second power adjustment value, the second power adjustment value is a power adjustment value received by the terminal device according to an indication value of a power adjustment field in downlink control information comprised in a first control information group, and the first control information group consists of downlink control information corresponding to downlink data in each subframe in a second subframe set; the second subframe set is a set of subframes in the first subframe set that are located on a first carrier; and the first carrier is a carrier on which the target physical uplink control channel is located; when the first indication information is second information, sending a target physical uplink shared channel. receiving downlink data from a network device in each subframe in a first subframe set, wherein the first subframe set comprises N subframes, and each of the N subframes is a downlink full subframe, or M of the N subframes are downlink partial subframes, and N-M of the N subframes are downlink full subframes, wherein M is less than or equal to N, and both M and N are integers, wherein the downlink full subframe is a subframe in which the downlink data occupies all symbols in the subframe, and the downlink partial subframe is a subframe in which the downlink data occupies part of symbols in the subframe; and wherein the first subframe set is transmitted on a plurality of carriers using carrier aggregation, obtaining first downlink control information from the network device, the first downlink control information comprises first indication information; and the first indication information may be either first or second information; and when the first indication information is first information, sending a target physical uplink control channel in a first uplink subframe according to an indication of the first downlink control information, wherein the target physical uplink control channel comprises first uplink control information, and the first uplink control information comprises hybrid automatic repeat request acknowledgement information corresponding to the downlink data that is in each subframe in the first subframe set and that is received by the terminal device; wherein the first downlink control information comprises second indication information, the second indication information indicates a first power adjustment value; the method further comprising: adjusting transmit power of the target physical uplink control channel by the first power adjustment value; the transmit power of the target physical uplink control channel being further adjusted by a power adjustment amount corresponding to a second power adjustment value, the second power adjustment value is a power adjustment value received by the terminal device according to an indication value of a power adjustment field in downlink control information comprised in a first control information group, and the first control information group consists of downlink control information corresponding to downlink data in each subframe in a second subframe set; the second subframe set is a set of subframes in the first subframe set that are located on a first carrier; and the first carrier is a carrier on which the target physical uplink control channel is located; when the first indication information is second information, sending a target physical uplink shared channel.