1. An interfacing method for supporting a speech dialogue service, the interfacing method comprising: executing an interface for the speech dialogue service; receiving a user input, through the executed interface, including a voice input and a non-voice input, the non-voice input being an image input; transmitting, as a request signal to a server, at least one of the voice input or a text extracted from the voice input when the received user input is the voice input; transmitting, as the request signal to the server, a text extracted from the non-voice input when the received user input is the non-voice input; receiving a result of dialogue recognition in response to the request signal from the server; and executing a response to the received user input on the basis of the received result of dialogue recognition.