[Objective]To explore the changes of poets in the time-space trajectory and emotional dimension, and provide a new research perspective for knowledge discovery in the humanities field.

[Context]In order to improve the visualization effect of the current digital humanities research process and the readability of the research results, the poet's emotional trajectory in time and space is expressed by applying ontology technology and GIS technology, and new research ideas and visualization research methods are provided for scholars in related fields.

[Methods]Taking Li Bai as an example, building the poet ontology model, and the knowledge modeling of the poet's related concepts and relationships is carried out, and then GIS technology is used to display the changes of Li Bai's temporal and spatial emotional trajectory, and explore the tacit knowledge behind it.

[Results]Li Bai's life trajectories spanned more than half of China, with the most frequent trajectories in Nanjing so far. From the perspective of space, when Tu is Li Bai's "sorrowful and joyful" place, Nanjing is Li Bai's "sorrowful" place. From the perspective of time, Li Bai was more "joyful" than "sorrowful" in his youth, "sorrowful" was more than "joyful" in middle age, and "sorrowful and joyful" in his later years.

[Conclusions]This paper provides practical experience for the study of poet's emotional trajectories in time and space, and provides new ideas and methods for the study of related issues in the humanities field.