A smart broadcast device, comprising: a device body, wherein the device body comprises a first surface that comprises a payment graphic code, wherein the payment graphic code includes an identifier of a merchant account and is scannable by a user for payment; a communication module, installed inside the device body and communicating with outside through a wireless link and/or a wired link, wherein the communication module is configured to use a Wi-Fi connection for sending a binding query request to a payment system for querying a binding status between the smart broadcast device and the merchant account and receive a bound query result or an unbound query result; a processing module, installed inside the device body and electrically connected to the communication module; and a speaker, installed inside the device body and electrically connected to the processing module, wherein the processing module outputs payment result audio signal to the speaker when receiving an external trigger signal, which is a payment result of a payment system that has processed a payment request for the merchant account, by using the communication module, to drive the speaker to output payment result audio, further comprising a LED status indicator installed on the device body and configured to output a corresponding light prompt for indicating if the binding status is abnormal, in response to a light drive signal output by the processing module wherein the processing module determines that the binding status is abnormal based on an unbound query result received from the payment system through the communication module. a device body, wherein the device body comprises a first surface that comprises a payment graphic code, wherein the payment graphic code includes an identifier of a merchant account and is scannable by a user for payment; a communication module, installed inside the device body and communicating with outside through a wireless link and/or a wired link, wherein the communication module is configured to use a Wi-Fi connection for sending a binding query request to a payment system for querying a binding status between the smart broadcast device and the merchant account and receive a bound query result or an unbound query result; a processing module, installed inside the device body and electrically connected to the communication module; and a speaker, installed inside the device body and electrically connected to the processing module, wherein the processing module outputs payment result audio signal to the speaker when receiving an external trigger signal, which is a payment result of a payment system that has processed a payment request for the merchant account, by using the communication module, to drive the speaker to output payment result audio, further comprising a LED status indicator installed on the device body and configured to output a corresponding light prompt for indicating if the binding status is abnormal, in response to a light drive signal output by the processing module wherein the processing module determines that the binding status is abnormal based on an unbound query result received from the payment system through the communication module.