A method for transmitting feedback information, comprising: determining (S 11), by a transmitting terminal, a first code book in accordance with a channel measurement result, wherein precoding matrices comprised in the first code book are obtained through transformation of a same construction matrix; calculating (S12), by the transmitting terminal, to obtain a first Channel Quality Indicator, CQI, in accordance with all or part of the precoding matrices in the first code book; and transmitting (S13), by the transmitting terminal, first indication information for indicating the first code book and second indication information for indicating the first CQI to a receiving terminal, characterized in that the calculating, by the transmitting terminal, to obtain the first CQI in accordance with all or part of the precoding matrices in the first code book comprises: selecting, by the transmitting terminal in accordance with serial numbers of REs included in each sub-band, a precoding matrix for each Resource Element, RE, from the first code book as a first precoding matrix for the RE, wherein at least two of the first precoding matrices for REs included in each sub-band are different; and for each first sub-band, calculating, by the transmitting terminal, to obtain the first CQI corresponding to the first sub-band in accordance with the first precoding matrix for each RE comprised in the first sub-band. determining (S 11), by a transmitting terminal, a first code book in accordance with a channel measurement result, wherein precoding matrices comprised in the first code book are obtained through transformation of a same construction matrix; calculating (S12), by the transmitting terminal, to obtain a first Channel Quality Indicator, CQI, in accordance with all or part of the precoding matrices in the first code book; and transmitting (S13), by the transmitting terminal, first indication information for indicating the first code book and second indication information for indicating the first CQI to a receiving terminal, characterized in that the calculating, by the transmitting terminal, to obtain the first CQI in accordance with all or part of the precoding matrices in the first code book comprises: selecting, by the transmitting terminal in accordance with serial numbers of REs included in each sub-band, a precoding matrix for each Resource Element, RE, from the first code book as a first precoding matrix for the RE, wherein at least two of the first precoding matrices for REs included in each sub-band are different; and for each first sub-band, calculating, by the transmitting terminal, to obtain the first CQI corresponding to the first sub-band in accordance with the first precoding matrix for each RE comprised in the first sub-band. selecting, by the transmitting terminal in accordance with serial numbers of REs included in each sub-band, a precoding matrix for each Resource Element, RE, from the first code book as a first precoding matrix for the RE, wherein at least two of the first precoding matrices for REs included in each sub-band are different; and for each first sub-band, calculating, by the transmitting terminal, to obtain the first CQI corresponding to the first sub-band in accordance with the first precoding matrix for each RE comprised in the first sub-band. <EOS>