To provide an information system collecting information related to a satisfaction degree from a person already visiting a specific area of an event, shopping or the like, and disclosing it on a network.

In this information system allowing the two-way wireless communication of an information center and a plurality of vehicles, the vehicle has a position detection means detecting position information about the vehicle, and a transmission means transmitting the position information to the information center. The information center has: a vehicle high-density area retrieval means retrieving an area having high vehicle density on the basis of the position information; a question transmission means transmitting a question related to the satisfaction degree of the area to the vehicle present inside the retrieved area; and a satisfaction degree information disclosure means receiving an answer to the question, and disclosing the information related to the satisfaction degree. By constructing this information system, the vehicle can receive the information related to the satisfaction degree.

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