A dialogue system, a dialogue system control method, and an electronic apparatus are configured to process a user speech to generate a system response before the user's speech ends by recognizing the user's intention When the user's speech is finished, the system response is output to continue a natural dialogue flow in real time. The dialogue system includes: a Speech to Text engine to convert a user speech into text; an intermediate dialogue engine configured to process an intermediate speech before user speech is terminated; a final dialogue engine configured to process a final speech after the user speech is terminated; and a controller. The controller is configured to input the converted text to the intermediate dialogue engine when user speech is not terminated, and to input the converted text to the final dialogue engine when user speech is terminated The dialogue system also includes a Text to Speech engine configured to convert the system response into a speech signal.