A method and apparatus for acquiring information on an access point (AP) in a wireless communication system is provided. An AP information management entity of a cellular system transmits a request for information on an AP, which is located within coverage of an eNodeB (eNB), to an AP server which is located outside of the cellular system, and receives a response, which includes a result code of the request, from the AP server. The AP information management entity is one of an eNB, mobility management entity (MME), or a new entity of the cellular system.