A method: broadcasting a first message comprising an apparatus type through near field communication; scanning a digital object identifier (DOI) that is displayed by a mobile terminal according to the first message and that matches the apparatus type, to obtain service information and identity information of the mobile terminal included in the DOI; broadcasting a second message generated based on the identity information; obtaining, from the mobile terminal, a request for a near field communication connection, the request being generated by the mobile terminal after the mobile terminal determines the second message includes information consistent with the identity information of the mobile terminal; verifying the request based on the identity information of the mobile terminal; in response to that the verification succeeds, establishing the near field communication connection to the mobile terminal; and executing a service through the near field communication connection according to the service information.