A method and apparatus for transmitting information in a wireless communication system is provided. A user equipment (UE) determines whether a failure of traffic steering, between a 3rd generation partnership project (3GPP) network and a wireless local area network (WLAN), has occurred. If it is determined that the failure of traffic steering has occurred, the UE logs information on the failure of traffic steering, and transmits the information on the failure of traffic steering to the 3GPP network when the connection with the 3GPP network is established.