Provided is a control method of a server providing information on an optimum AP. The control method of the server comprises: acquiring wireless communication connection information of at least one user terminal and location information of the at least one user terminal, from each of the at least one user terminal; when a request for an access point (AP) search is received from a first user terminal, determining at least one optimum AP which can connect with the first user terminal, on the basis of the acquired wireless communication connection information and location information; and transmitting information on the determined optimum AP to the first user terminal.