To easily retrieve a facility where a special favor is prepared for a specified member.

In this navigation system 100, a user assigns a credit card or the like of the member which the user belongs to, inputs a prescribed retrieval condition, and transmits a prescribed retrieval request to a service center 200. In the service center 200, the facility satisfying the retrieval condition is retrieved to send back, to the navigation system 100, a retrieved result added with the presence of the special favor for the member and a content of the special favor corresponding to the each facility. In the navigation system 100, a facility list as the retrieved result is displayed to show the presence of the special favor for the member.