A method of sending feedback information, the method comprises: determining, by a user equipment, a dedicated feedback timing; and for a subframe which corresponds to downlink subframe according to the dedicated feedback timing and is uplink subframe on a particular carrier, sending, by the user equipment, feedback information, corresponding to downlink data of the said subframe, on the primary carrier according to the determined dedicated feedback timing; or, for a particular subframe which corresponds to uplink subframe according to the dedicated feedback timing but is downlink subframe on the particular carrier, performing, by the user equipment, one of the following processing: sending, by the user equipment, no feedback information corresponding to the particular subframe; or bundling, by the user equipment, the feedback information corresponding to the particular subframe, with feedback information of at least one downlink subframe located immediately before or after the particular subframe on the particular carrier, and sending the bundled feedback information at an uplink subframe on the primary carrier according to the determined dedicated feedback timing, wherein the said uplink subframe corresponds the feedback information of the at least one downlink subframe located immediately before or after the particular subframe; wherein the user equipment is a user equipment which is configured with carrier aggregation with different TDD uplink-downlink configurations; wherein, the dedicated feedback timing is a feedback sending timing used specifically for a user equipment which is configured with carrier aggregation with different TDD uplink-downlink configurations. determining, by a user equipment, a dedicated feedback timing; and for a subframe which corresponds to downlink subframe according to the dedicated feedback timing and is uplink subframe on a particular carrier, sending, by the user equipment, feedback information, corresponding to downlink data of the said subframe, on the primary carrier according to the determined dedicated feedback timing; or, for a particular subframe which corresponds to uplink subframe according to the dedicated feedback timing but is downlink subframe on the particular carrier, performing, by the user equipment, one of the following processing: sending, by the user equipment, no feedback information corresponding to the particular subframe; or bundling, by the user equipment, the feedback information corresponding to the particular subframe, with feedback information of at least one downlink subframe located immediately before or after the particular subframe on the particular carrier, and sending the bundled feedback information at an uplink subframe on the primary carrier according to the determined dedicated feedback timing, wherein the said uplink subframe corresponds the feedback information of the at least one downlink subframe located immediately before or after the particular subframe; wherein the user equipment is a user equipment which is configured with carrier aggregation with different TDD uplink-downlink configurations; wherein, the dedicated feedback timing is a feedback sending timing used specifically for a user equipment which is configured with carrier aggregation with different TDD uplink-downlink configurations. sending, by the user equipment, no feedback information corresponding to the particular subframe; or bundling, by the user equipment, the feedback information corresponding to the particular subframe, with feedback information of at least one downlink subframe located immediately before or after the particular subframe on the particular carrier, and sending the bundled feedback information at an uplink subframe on the primary carrier according to the determined dedicated feedback timing, wherein the said uplink subframe corresponds the feedback information of the at least one downlink subframe located immediately before or after the particular subframe; wherein the user equipment is a user equipment which is configured with carrier aggregation with different TDD uplink-downlink configurations; wherein, the dedicated feedback timing is a feedback sending timing used specifically for a user equipment which is configured with carrier aggregation with different TDD uplink-downlink configurations.