A measurement method of a non-connected state user-side device, a measurement method of a non-connected state user-side device and a user-side device are provided. The method includes: acquiring, by the user-side device, non-connected state measurement configuration information; performing, by the user-side device, a non-connected state measurement according to the non-connected state measurement configuration information. According to the present disclosure, based on the non-connected state measurement configuration information, the user-side device may help the network-side device to select a suitable user-side device to perform the non-connected state measurement, thereby achieving the measurement of the non-connected state user-side device. In addition, the non-connected state measurement configuration information may include inter-frequency measurement configuration information, thereby achieving an inter-frequency measurement and saving resources of the user-side device during the measurement.