The present invention relates to the communications field, and specifically, to a method for measuring and feeding back channel state information. The method includes: receiving, by UE, a first channel state information report type configured by a base station and K channel state information-reference signal CSI-RS resources delivered by the base station, where K is an integer greater than or equal to 1; determining, by the UE according to the channel state information report type, a rank indication RI and/or a beamforming indication BI on S subbands of a wideband on which the K CSI-RS resources are transmitted, where S is an integer greater than or equal to 1; calculating, by the UE, a channel quality indicator CQI on the S subbands; and reporting, by the UE, the RI, the BI, and the CQI on a physical uplink control channel PUCCH by using a report. In embodiments of the present invention, because a PUCCH feedback mode is redesigned, the BI can be smoothly reported, so as to adapt to a beamformed CSI-RS mechan
