Abstract: The Laws is one of Plato's most important educational works. This work deals with the question of "who is the student". In Plato's view, the two Doris old people of Doris, as legislators, are students present. Although the young people are excluded from the on-site dialogue and absent, they are still students. The two old men of Doris, not closely related to the Athenians as teachers, but as students, their nature is remarkable and teachable. The reason why young people are not present is basically for the smooth progress of education for the elderly, because the temperament of young people is different from that of the elderly, and their presence at the same time will affect the achievement of good educational results. Plato's classification of students is out of the need for the construction of the second best city-state, showing Plato's excellent classical educational wisdom.