A radio measurement collection method using UE configured to perform a process of retaining a measurement log including a measurement result of a radio environment according to a measurement configuration set by a measurement configuration message received from a network includes a step S109 in which the network transmits a UEInformationRequest message to request a transmission of the measurement log to the UE, and a step S110 in which the UE transmits a UEInformationResponse message to transmit the measurement log to the network. In step S110, the UE transmits the UEInformationResponse message to the network even when the measurement log is not retained.