A method of fitting a hearing aid connected to a mobile terminal is provided. The method may include acquiring location information of a location of the mobile terminal, transmitting the location information to a server, receiving, from the server, information about at least one recommended fitting parameter model adapted to hearing conditions of the location and hearing characteristics of a user of the hearing aid, and displaying the information about the at least one recommended fitting parameter model. The method may also include receiving a fitting parameter model selected by the user from among the at least one recommended fitting parameter model, and controlling the hearing aid to function according to the received fitting parameter model.