Objectives: To distinguish between the differences in cultural services based on the type of urban green area, through atypical expressions.Context: Urban green spaces provide important ecosystem services, with cultural ecosystem services (CES) playing a significant role in citizens’ lives. Nevertheless, these are often undervalued as it is difficult to quantitatively evaluate the characteristics of an individuals’ subjective perception of urban space. By examining social media content, we can analyze the content created by users and grasp demand values. Methods: This study analyzed urban green areas in the inland of Ansan city in Gyeonggi-do, South Korea. Data were collected twice, on October 3, 2017 and October 4, 2018, to verify that the extracted keywords were representative. We extracted keywords from blog posts related to CES and evaluated the possibility of using them as quantitative indicators. Results: The results indicate that the perceived expression words were different depending on the type of green space. Certain CES such as “exhibit” and “climbing” are affected by green space type. However, it was difficult to identify emotional responses to CES. We found that some words contained double meanings, which made it difficult to evaluate individuals’ perceptions of CES based on the frequency of specific words.Conclusions: This study demonstrates that social media data on CES greatly extends the type and, especially, the volume and scale of information derived from traditional survey methods. The significance of this study lies in its attempt to quantitatively evaluate the recognition of CES in daily life.