The present invention provides a method and device for carrying out feedback and reception of channel state information (CSI). The method for carrying out feedback of CSI by UE comprises a step of determining at least one CSI feedback configuration group configured by a base station according to the instruction of the base station, wherein each CSI feedback configuration group comprises at least one CSI feedback configuration, a step of reporting the CSI obtained based on a first CSI feedback configuration to the base station through a PUCCH or PUSCH when the need of CSI reporting is determined, wherein the CSI feedback configuration is determined by the UE from a corresponding CSI feedback configuration group according to the position information of a recently reported CSI feedback configuration or the position information of the CSI feedback configuration indicated by the base station. The independent reporting of the position information and the corresponding CSI is supported, thus the detection performance of the information is improved, the acquisition of the corresponding CSI of specified CSI feedback configuration by the base station is also supported, and the flexible downlink scheduling and transmission are carried out.