Provided are a method and apparatus for determining the quantity of channel quality indicators (CQI). The method comprises: a terminal determining the quantity of ranks or the quantity of CQIs to be fed back according to at least one piece of the following pieces of information: the quantity of ports of a channel state information referenced signal (CSI-RS), the quantity of ports of a downlink demodulation reference signal (DMRS), and a configuration signalling of a base station. The present invention solves the problem of non-matching between CQIs reported by a TDD system under an FD-MIMO and CQIs actually needing to be used in the related art, improves the reliability of downlink transmission, saves overheads of a downlink signalling, and improves the downlink transmission performance.