An information sending method, comprising: determining, by a terminal according to a detected downlink control channel in a downlink subframe, the downlink subframe scheduled by a network device, wherein the downlink subframe is in an instantly scheduled downlink subframe set which comprises downlink subframes of the terminal that are actually scheduled by the network device and is a subset of a preconfigured downlink subframe set for the terminal including all downlink subframes on all carriers corresponding to an uplink subframe carrying the feedback information, and the terminal is a terminal supporting carrier aggregation, CA; obtaining, by the terminal, an index field carried on the downlink control channel, wherein a value of the index field is a count value obtained by performing accumulative counting in a carrier-first and subframe-second order in the instantly scheduled downlink subframe set; obtaining, by the terminal, a sum field carried on the downlink control channel in the downlink subframe in the instantly scheduled downlink subframe set, wherein the sum field is used to indicate a total quantity of scheduled downlink subframes of the terminal in a downlink subframe set corresponding to a current downlink subframe number in the instantly scheduled downlink subframe set and in a downlink subframe set corresponding to subframe numbers of all downlink subframes before a subframe moment of the current downlink subframe number in the instantly scheduled downlink subframe set; determining, by the terminal, to send feedback information for the downlink subframe to the network device in a first feedback manner, wherein in the first feedback manner, a first codebook of the feedback information is corresponding to the downlink subframe in the instantly scheduled downlink subframe set; and sending, by the terminal, the feedback information to the network device in the first feedback manner. determining, by a terminal according to a detected downlink control channel in a downlink subframe, the downlink subframe scheduled by a network device, wherein the downlink subframe is in an instantly scheduled downlink subframe set which comprises downlink subframes of the terminal that are actually scheduled by the network device and is a subset of a preconfigured downlink subframe set for the terminal including all downlink subframes on all carriers corresponding to an uplink subframe carrying the feedback information, and the terminal is a terminal supporting carrier aggregation, CA; obtaining, by the terminal, an index field carried on the downlink control channel, wherein a value of the index field is a count value obtained by performing accumulative counting in a carrier-first and subframe-second order in the instantly scheduled downlink subframe set; obtaining, by the terminal, a sum field carried on the downlink control channel in the downlink subframe in the instantly scheduled downlink subframe set, wherein the sum field is used to indicate a total quantity of scheduled downlink subframes of the terminal in a downlink subframe set corresponding to a current downlink subframe number in the instantly scheduled downlink subframe set and in a downlink subframe set corresponding to subframe numbers of all downlink subframes before a subframe moment of the current downlink subframe number in the instantly scheduled downlink subframe set; determining, by the terminal, to send feedback information for the downlink subframe to the network device in a first feedback manner, wherein in the first feedback manner, a first codebook of the feedback information is corresponding to the downlink subframe in the instantly scheduled downlink subframe set; and sending, by the terminal, the feedback information to the network device in the first feedback manner.