Different classes.
In the way of attending classes, adult education and on-the-job graduate students are both part-time classes. The former is at night or on weekends, and the latter is at weekends or holidays.
Adapt to the same crowd
In adapting to the crowd, both of them are channels for working people to learn and improve themselves, which are suitable for working people to learn.
Belong to different levels
From the subordinate level, adult education belongs to the type of literacy education, which provides opportunities for some people with lower academic qualifications to receive higher education, while the starting point of in-service graduate students is undergraduate education, which belongs to the type of high-level education.