綜觀現今公益海報設計，多以反諷手法創作攫取觀眾目光，而反諷一詞源自修辭法中的倒反法，除了在文字上的運用，近期也常運用於視覺傳達領域中。反諷式海報能帶給人們強烈的視覺印象以及深刻的情感，比起一般手法更能引發省思，且恰當地運用反諷手法，能增強海報整體的視覺張力。本創作研究首先論述反諷從文字修辭學到圖像符號學的概況，接著彙整圖像相關表現形式手法，最後進入訊息符號由繁轉簡的過程。統整後便展開主題創作，可區分為「環境」、「社會」、「自我」三類，整體共九張海報，以人為核心，將主題延伸至自然萬物本應和平共存，但從食品安全疑慮到環境過度開發，人類與自然長期暴露在危險中，不僅環境遭到破壞，人類更有生理殘疾引發心理殘缺等深層問題，可見若破壞人與自然間的平衡，對彼此都會造成嚴重影響。最後，因應網路科技的發達，人們接受訊息已不再受限於平面媒體，於是將海報元素分解並重組再製成動態圖像，便於發佈網路數位平台以增加傳播速度。透過本創作研究成果，提倡人類對環境、社會與自我的重視，並創造身心健康、永續節能的雙贏未來。

Nowadays, more and more designs of public service posters have used the ironic technique to attract audience. The word irony is actually originated by the inversion method in the rhetoric, which is not only used in texts, but also commonly seen in the field of visual communication recently. Ironic posters can bring people strong visual impressions and profound emotions, which is easier to trigger reflection than the general approaches; in addition, appropriate use of ironic technique can enhance the overall visual tension of the poster. This study first gives an overview of irony from text rhetoric to image symbols, and then aggregates techniques of image expression, finally turns into the simplification process of the information symbols. The author conducts creation based on the exploration mentioned above. The overall of nine posters are divided into three categories of "environment", "society" and "ego", all of which are people-centered and extended to the theme that all beings should coexist peacefully. However, the nature and human are always exposed to risks such as the over-exploitation of environment and the concerns of food safety. Besides the damages on the environment, human beings also suffer from mental defects caused by physical disabilities. Thus, if the balance between human and the nature is damaged, both of them will be impacted by each other seriously. Finally, as people no longer accept information only from prints due to the well-developed technology of Internet, the poster elements are decomposed and recombined into dynamic images to facilitate the online publishing and fast spread. It’s suggested from the results of this study that human should emphasize on importance of the environment, society and ego and create a win-win future that is healthy, sustainable and efficient.