This research investigated the levels of adjustments of international student and demographic factor, such as gender, group of nationalities, and age, differing in adjustment and tried to understand their satisfaction and hardship experienced in their adjustment. It focused three dimensions of adjustment: academic, social and personal-emotional adjustment. The research was performed at Prince of Songkla University, Hat Yai Campus, Thailand as a case study. Mixed method was adopted. 153 participants and 13 key informants responded to the research. It was found that academic adjustment had the highest score among three dimensions, and also found that differences were showed in two dimensions: age and group of nationalities in personal-emotional adjustment and group of nationalities in academic adjustment. Three themes were identified to understand their satisfaction and hardship for enhancing a better adjustment: Successful Academic Achievement, Languages Barriers, and Consideration for the Marginal.