As an excellent text of ancient poetry, the Full Collection of Tang Poems is a precious heritage of the treasure house of Chinese culture. This article takes the Hemerocallis fulva poetry in Full Collection of Tang Poem as the research object. Through the semantic analysis method, with the help of ROST-CM6 software for semantic and cluster analysis and using the spatial information analysis method for visual presentation, this paper interprets the Hemerocallis fulva plant culture in the Full Collection of Tang Poems. It constructs the Hemerocallis fulva plant culture connotation system from the perspectives of humans, land, and landscape. The results show that Hemerocallis fulva poetry presents the humanistic emotion of “forgetting worries, filial piety and homesickness, seclusion and leisure, gorgeous boudoir, gentleman worrying about the country, war, and separation”. Besides, it also takes the landscape application of “plants, humanities, cities, courtyards, and scales”, there is apparent clustering in the plant, human, and scale. Moreover, different geographical regions show other emotional and landscape characteristics, “one place one culture, one place one landscape”.