With the rise of ESG (Environmental, Social, and Governance) principles, an increasing number of small and medium-sized enterprises (SMEs) have recognized the significant role of ESG. However, due to limited funding and resources, many SMEs are still confused about how to take the first step toward implementing ESG. This study focuses on 360 SMEs and employs SmartPLS 4.0 for data analysis. The results show that background driving factors (the necessity of ESG), as well as external pressure factors (government pressure, media pressure, and competitive pressure), all have a positive influence on SMEs’ intention to adopt ESG practices. Through a comparative analysis between South Korea and China, the study finds that there is no significant difference between the two countries in terms of the impact of the necessity of ESG on the adoption intention. However, government pressure has a more significant impact on the ESG adoption intention of SMEs in China than in South Korea. In contrast, media pressure and competitive pressure have a more significant effect on the intention of SMEs in South Korea than in China. This research provides a theoretical foundation for enhancing the understanding of SMEs' intentions to adopt ESG practices, which is crucial for promoting social responsibility and enhancing competitiveness. It also offers empirical supp.ort and policy recommendations for policymakers and SME managers, especially in the context of rapidly changing international economic and trade environments, multi-dimensional pressures, and sustainable development strategies.