A channel measurement method being performed by a terminal device, comprising: receiving, from a network device, which is a base station, a configuration of a first channel state information reference signal, CSI-RS, resource periodicity and a configuration of a first channel state information, CSI, report periodicity that are of a secondary cell of the terminal device, wherein the first CSI-RS resource periodicity is used for receiving a first CSI-RS from the network device in a first time period, and the first CSI report periodicity is used for reporting CSI of the secondary cell to the network device in the first time period; and receiving (S301'), from the network device, a configuration of a second CSI-RS resource periodicity and a configuration of a second CSI report periodicity that are of the secondary cell of the terminal device, wherein the second CSI-RS resource periodicity is used for receiving a second CSI-RS from the network device in a second time period, and the second CSI report periodicity is used for reporting CSI of the secondary cell to the network device in the second time period, the method characterized in that: the second time period is after the first time period; wherein the first time period is duration between a start of activation of the secondary cell and completion of the activation of the secondary cell, and the second time period is duration starting from the completion of the activation of the secondary cell; wherein the first time period is less than the second time period; wherein the second CSI-RS resource periodicity is n times of the first CSI-RS resource periodicity, and n is greater than 1. receiving, from a network device, which is a base station, a configuration of a first channel state information reference signal, CSI-RS, resource periodicity and a configuration of a first channel state information, CSI, report periodicity that are of a secondary cell of the terminal device, wherein the first CSI-RS resource periodicity is used for receiving a first CSI-RS from the network device in a first time period, and the first CSI report periodicity is used for reporting CSI of the secondary cell to the network device in the first time period; and receiving (S301'), from the network device, a configuration of a second CSI-RS resource periodicity and a configuration of a second CSI report periodicity that are of the secondary cell of the terminal device, wherein the second CSI-RS resource periodicity is used for receiving a second CSI-RS from the network device in a second time period, and the second CSI report periodicity is used for reporting CSI of the secondary cell to the network device in the second time period, the method characterized in that: the second time period is after the first time period; wherein the first time period is duration between a start of activation of the secondary cell and completion of the activation of the secondary cell, and the second time period is duration starting from the completion of the activation of the secondary cell; wherein the first time period is less than the second time period; wherein the second CSI-RS resource periodicity is n times of the first CSI-RS resource periodicity, and n is greater than 1. the second time period is after the first time period; wherein the first time period is duration between a start of activation of the secondary cell and completion of the activation of the secondary cell, and the second time period is duration starting from the completion of the activation of the secondary cell; wherein the first time period is less than the second time period; wherein the second CSI-RS resource periodicity is n times of the first CSI-RS resource periodicity, and n is greater than 1.