A Channel State Information, CSI, reporting method for a terminal, comprising: receiving (S 110), from a network side device, a resource set configured by the network side device, the resource set comprising a plurality of measurement resources; measuring a downlink reference signal for a plurality of transmission nodes in accordance with the plurality of measurement resources, to determine a target Channel State Information-Reference Signal, CSI-RS, port set for CSI measurement; and performing calculation in accordance with the target CSI-RS port set to acquire to-be-reported CSI, characterized in that the CSI reporting method further comprises: acquiring a correspondence between CSI-RS port sets and different rank values supported by the transmission nodes, the correspondence being configured by the network side device in accordance with the plurality of measurement resources; wherein the measuring of the downlink reference signal for the plurality of transmission nodes in accordance with the plurality of measurement resources to determine the target CSI-RS port set for the CSI measurement comprises: selecting, from the correspondence in accordance with channel measurement data acquired through measuring the downlink reference signal, one of the rank values as a target rank value, and determining a CSI-RS port set corresponding to the target rank value as the target CSI-RS port set. receiving (S 110), from a network side device, a resource set configured by the network side device, the resource set comprising a plurality of measurement resources; measuring a downlink reference signal for a plurality of transmission nodes in accordance with the plurality of measurement resources, to determine a target Channel State Information-Reference Signal, CSI-RS, port set for CSI measurement; and performing calculation in accordance with the target CSI-RS port set to acquire to-be-reported CSI, characterized in that the CSI reporting method further comprises: acquiring a correspondence between CSI-RS port sets and different rank values supported by the transmission nodes, the correspondence being configured by the network side device in accordance with the plurality of measurement resources; wherein the measuring of the downlink reference signal for the plurality of transmission nodes in accordance with the plurality of measurement resources to determine the target CSI-RS port set for the CSI measurement comprises: selecting, from the correspondence in accordance with channel measurement data acquired through measuring the downlink reference signal, one of the rank values as a target rank value, and determining a CSI-RS port set corresponding to the target rank value as the target CSI-RS port set. acquiring a correspondence between CSI-RS port sets and different rank values supported by the transmission nodes, the correspondence being configured by the network side device in accordance with the plurality of measurement resources; wherein the measuring of the downlink reference signal for the plurality of transmission nodes in accordance with the plurality of measurement resources to determine the target CSI-RS port set for the CSI measurement comprises: selecting, from the correspondence in accordance with channel measurement data acquired through measuring the downlink reference signal, one of the rank values as a target rank value, and determining a CSI-RS port set corresponding to the target rank value as the target CSI-RS port set.