The purpose of the study was to investigate the characteristics of the non-typical adult undergraduate students and their perceived performance of higher education, including satisfaction and learning outcomes. In order to achieve this purpose, the SDLR(Self-Directed Learning Readiness) of the adult students in G university, the satisfaction about higher education, their perceived learning outcome, and the relationship between their SDLR and performance in higher education were analyzed. The results of the study showed that there were no significant differences of the SDLR of the adult students by sex, age, period of working experience, and kinds of admission, that there was a significant positive relationship between the satisfaction about higher education and the age, the period of working experience, and the student entering through the special admission for specialized high school graduates, and that their perceived learning outcome had the similar patterns with the satisfaction about higher education. Also, there was a significant positive correlation between the SDLR of the adult undergraduate students and their perceived performance of higher education. And adult students' SDLR illustrated a significant role on their educational satisfaction and learning outcome of higher education. According to these results, it might be concluded that universities need to make up for the instructors and educational contents for the adult learners, and to seek a better plan to improve their perceived performance related to job performance, in order to meet the demands for the recurrent education as well as the continuing education in universities of the adult learners with relatively high SDLR.