Speaker's attitude in the negative questions was analyzed using four drama scripts. Speakers's attitude can be defined as four kinds of stereotypes. Firstly, speakers use negative questions to know about something. Speakers ask listeners information. In this type, the negative questions can not be paraphrased to other sentences. Comparing with positive questions, these include more doubts about facts and informations. Confirmatory questions are more frequent than informative questions in negative questions. Secondly, speakers show attitudes of order using negative questions. Negative question can be more polite than imperative sentence when speaker makes an order. Negative question using “MOT”can become a more powerful imperative sentence. Thirdly, speakers can insist their opinion using negative questions. Speakers use negative questions to suggest opposite facts about their statements or to affirm the facts. Fourthly, speakers persuade listeners using negative questions. Persuasion is different from order. Persuasion discloses speaker's interactional intention to listener. In order to be an excellent conversation, it should be based on the cooperative principles between speaker and listener. It should be based on the inference principle, too.