Abstract: Studies of image words in poetry is an important part in the research about Chinese vocabulary history.Tang poetry，the peak of Chinese classic poetry，makes the study of image words in them especially significant.This paper is the linguistic analysis of the image words concerned with “Yan”(smoke) in Bai Juyi′s poetry.Through analysis of examples，the author intends to explain the implied meaning behind the image words from the perspective of linguistic study and thus to reveal the humanistic factors and cultural accumulation integrated into them.It is hoped that this study may contribute to the research about Chinese vocabulary history by offering a new angle.

Key words: Tang poetry, Bai Juyi, image words, implied meaning, linguistic analysis