Disclosed is a method for improving network performance, comprising: according to the signal-to-interference-plus-noise ratio (SINR) of high speed physical downlink shared channels (HS-PDSCHs) on two or more than two carriers, which is obtained by way of measurement, respectively acquiring, by a user equipment (UE), a channel quality indicator (CQI) of the HS-PDSCH on each carrier; when it is determined that the difference between the SINR of the HS-PDSCH on one or more than one carrier in all the carriers and the maximum SINR of the HS-PDSCHs on all the carriers is greater than a first threshold value, updating the CQI of the HS-PDSCH on the one or more than one carrier; and reporting the CQIs of the HS-PDSCHs on all the carriers to a network side, the CQIs being used for the network side to schedule the UE. Also disclosed at the same time are a UE and a storage medium.