This study is focused on the Buddha’s education in the Chinese translation of the Dirghagama Sutra, where the Buddha faced various questions and challenges brought up by his disciples and some contemporaries with different beliefs or social background, who came from each caste, which had different background and aptitudes. In order to propagate his religious messages duly, the Buddha unfolded his multiple teachings in accordance with different situations including the understanding and needs, such as the vehicles of humans, devas and Wravaka and so on, of his disciples or his contemporaries. The Buddha’s education not only offered the learners the ethical regulations to abide by, but also led them to achieve the ultimate salvation. This study contains six chapters, which will be stated briefly as follows. The first chapter relates to the motive of this study, explains the title of this study, examines the outcomes of the scholarly research, and refers to the intended results of this study. The second chapter explores the comments the Buddha made on the issues about religious instruction and the views the Buddha expounded. In order to prevent them from going astray, the Buddha taught his disciples how to distinguish the right from the wrong, and also how to transform bad conditions into religious cultivation. The third chapter makes clear the relationship and the distinction between the teachers and the students within the world of the Buddha’s instruction. With good interaction between the teachers and the students, the quality of education could be greatly improved. The fourth chapter explores the principles and ethos of the Buddha’s teachings, and enumerates fourteen specific instructing methods in the Buddha’s instruction. According to what the Buddha said, whether he or she came from a family of pedigree or not, any student can reach the highest enlightenment in the end. The Buddha taught anyone according to one’s aptitudes and needs. The fifth chapter inducts the permeation and the conclusion of the path of practicing the dharma through staying in the secular world (Skrt. loka) and transcending the world (Skrt. Lokottara ; Pali. lokuttara), and the limitations of the Buddha’s education. The sixth chapter concludes this study. In the Dirghagama Sutra, there is not a distinct border line between loka and lokattara. The different teachings toward different aims, based on each other, merge with each other and improve each other.