Explored the value of ethnographic methods in language landscape research and emphasized the importance of selecting research methods. The "deep description" feature of ethnographic methods requires researchers to observe and record the setting of language landscapes in depth, revealing their relationship with social space. Through ethnographic methods, researchers can view language landscapes as a part of urban society and explain the reasons for their establishment. The language landscape of urban residential areas mainly targets internal residents, while the language landscape of commercial streets is aimed at anonymous consumers. The symbolic radiation range and pragmatic effects of language landscape vary depending on the recipient. The spatial logical connections inside and outside the community reflect the distinction between social acquaintances and strangers. Ethnographic fieldwork requires researchers to deeply observe the context in which language landscapes are located and reveal urban social mechanisms. Researchers need to engage in immersive thinking and action, understand the intentions of the recipients pointed to by the language landscape, and walk in the social space marked by the language landscape. The ethnographic method makes language landscape research a sociolinguistic study, rather than simply landscape photography.