A method and apparatus for updating information of an access point for a wireless local area network service in measuring a location of a communication terminal using the access point are provided. The method includes: storing information of access points in a storage unit; receiving information of nearby access points from a specific communication terminal to be measured for location; checking whether there exists an access point of which information is not stored in the storage unit among the nearby access points; performing a global positioning system (GPS) location measurement for the specific communication terminal when there exists the access point of which the information is not stored; and storing the GPS location measurement result and the information of the nearby access points in the storage unit.