The purpose of this study was to find out how speakers apply metaphors as a strategy of speech construction to achieve their goals. The study aimed to analyze the aspects of speech construction through a discourse of actual lectures (which are speeches meant to provide information), to find out how metaphors are used in topics and key contents of speeches, and to discuss the effects of metaphors on the effectiveness of the speaker’s delivery of the speech. When planning the content of a speech, speakers must consider the various situational factors that are related to the speech, such as the purpose, the audience, and the location. In addition, they must deliver the key message to the audience clearly and persuasively. Metaphors are audience-oriented figures of speech that assist speakers to convey the key message in an interesting and clear way and to emphasize only the key points. When metaphors are strategically placed within the topic, the title, or the key contents of the speech, they can help to make the audience understand the message clearly and to persuade them. The findings of this study will help to design a methodology that applies metaphors in writing manuscripts for speeches. Future studies can complement this study by comparing and analyzing the characteristics and aspects of types of persuasion speeches and identifying the reactions of the audience after they have listened to the speech.