Access network selection method and user equipment

An access network selection method and user equipment (UE), the method comprising: when a radio access network (RAN) is in an idle state, a UE determines whether a first service transmitted by the UE in a wireless LAN (WLAN) satisfies a condition of executing an interoperation strategy; if yes, then the UE employs the interoperation strategy to select an access network for the first service; and if not, then the UE transmits the first service in the WLAN. Also disclosed is a corresponding UE. When a connection state changes, the technical solution of the present invention enables a UE to determine an access network selected for the service thereof, thus accurately accessing the network.