The invention discloses an information interaction method used for a wireless charging system. The method comprises the following steps that when entering into a charging parking stall, a vehicle acquires identification information corresponding to the charging parking stall; the vehicle sends a request of acquiring charging equipment communication address information to charging equipment and the request is loaded with the identification information so that the charging equipment receives the request; and when the identification information exists in the charging equipment, the vehicle receives a response returned by the charging equipment according to the request and the response is loaded with the communication address information of the charging equipment. The invention also discloses an information interaction system used for the wireless charging system. In the invention, automatic dynamic matching of the vehicle and the communication address information of the ground charging equipment in a vehicle wireless charging technology is realized and a user experience effect is improved.