This study takes Xiangnan University as the research subject and employs field investigation methods to systematically analyze the campus linguistic landscape, exploring the characteristics of university linguistic landscapes and their mechanisms in campus image construction. The findings reveal that the linguistic landscape of Xiangnan University demonstrates diverse functions in information transmission, educational guidance, management standardization, and cultural atmosphere creation. In terms of types, it encompasses five major categories: campus buildings, cultural stone carvings and sculptures, information signs, publicity notices, and environmental protection. Further analysis indicates that campus linguistic landscapes participate in school image construction through three-dimensional pathways: in the physical space dimension, standardized signs shape an orderly and professional material environment; in the social space dimension, cultural activities create an open and inclusive interpersonal atmosphere; and in the psychological space dimension, motivational slogans strengthen teachers' and students' emotional identification and sense of belonging. This study reveals the profound role of linguistic landscapes in the university educational environment and provides empirical references for the cultural construction of local application-oriented undergraduate institutions.