Three main purposes of this thesis were (1) to study a method of the Buddha and his followers,(2) to study a method of Phratheprattanakawi’s Buddhist propagation, and (3) to study analytically a result of his Buddhist propagation. A result of this study was in the following points.

                A method of the Buddha’s Buddhist propagation was the Strategy for the city surrounding the forest by making a leader of the city believable in Buddhism and then, all his followers came to believe in Buddhism. There was an example of such a case when the Buddha taught the King Bindusara. This method aimed at making all listeners understand clearly what they should know, believe in the shown teachings, and keep them applied to the daily life. All followers of the Buddha derived such a method of the Buddha’s teaching that could bring peace and happiness to the communities and societies from the past to the present.  

                A method of Phratheprattanakawi’s Buddhist propagation was found in done in the six given ecclesiastical duties. The first was administration that he followed carefully all rules issued by the Sangha Supreme Council with the use of the supremacy of Dhamma. The second was education that he had great support and promotion to worldly and ecclesiastical education: Dhamma-Pāli, the secondary school, and the university. The third was social service to support and motivate the education by establishing the public school and Sunday Buddhist School. The fourth was the Buddhist propagation to support and motivate the Buddhist propagation by establishing the department or appointing many good persons to hold specially the Buddhist propagation such as a work of the Buddhist spread to instruct people in each opportunity. The fifth was the public utilities to support the construction and restoration of the Buddhist buildings. The sixth was welfare facilities to support properly the construction of the governmental institute’s buildings such as schools, hospitals, and private companies. A method of Phratheprattanakawi’s Buddhist propagation was that he used many ways: teaching, Buddhist propagation through the Buddhist literary works—three volumes of Buddhabhasitsakitcai about 1,500 stories, giving sermons in various opportunities, Dhamma talk on radio, Sor Wor Tor 102.75 MHz at 6.00 Am.

                A result of Phratheprattanakawi’s Buddhist propagation depended upon beign responsible for the six given ecclesiastical duties. His ecclesiastical administration helped monks and novices to have good conduct and keep people’s beliefs. In his support of education, monks, novices, children and the youths got both mundane and supramundane knowledge. In his social service, there were many scholarships given to monks, novices, children and the youths. In the Buddhist propagation, he spread Buddhism through many activities that people could take the Buddha’s teachings applied to their daily lives. His public utilities made people comfortable from the construction and restoration of the buildings: a making-merit hall, a Buddha hall, etc. and the governmental institutes: schools, hospitals, etc. He made welfare facilities by giving things to people who had faced the flood, storms, etc. in order to release their suffering in that time.