This thesis is a study of the doctrinal principles and promoting the activities of living together by the Buddhist and the Christian students. There are 3 objectives namely, 1) to study of the doctrinal principles of living together in Buddhism, 2) to study of the doctrinal principles of living together in Chritinity, and 3) to study of the promoting of the activities living together of the final secondary students at Pramandanijjanukroah School. This thesis is the documemtary and servey research. The 394 the final secondary students at Pramandanijjanukroah School are the exemplary group. The collection of data is the questionnares and interview from 5 excutives and 13 teachers. The frequency distribution, the percentage, the mean and the standard deviation are used in this study.

From the result of the study, it is found that

1.  From general information from 394 questionnaire respondents, it is found that 223

people were female and 171 people were male at the percentage of 56.60 and 43.40 respectively.

2.  The result of the data analysis relating to learning together of both the Buddhist and the Christian students who trust in the religious principles with mean and standard deviation showed that the highest levels was gratitude (x= 4.31) and unity (x= 4.33) ; high level was discipline (x= 4.05), knowledge seeking (x= 3.72), honesty (x= 4.05), economy (x= 3.88),  sacrifice (x= 4.21), and responsibility (x= 3.77), respectively.

3.  The comparison analysis of building up morality of the students classified according  to parents’ occupation and ethical model found that

3.1  By parents’ occupation  :  132 the business owners are at the percentage of 33.50, the 25 employees are at the percentage of 22.84, 15 the government officers are at the percentage of 13.71, 1 the farmer is at the percentage of 0.76 and 115 those of other occupations (company officers, state enterprise officers, teachers etc.) are at the percentage of 29.19.

3.2  By ethical models classification  :  231 the parents are at the percentage of 58.63, 102 the teacher are at the percentage of 25.89, 49 the grandparents are at the percentage of 12.44, 4 other people are at the percentage of 1.01, 7 stars and singers are at the percentage of 1.78 and one friend is at the percentage of 0.25.

There were 10 areas of teaching ethics and morals to both Buddhist and Christian students.  The area that gaired the highest score was gratitude compared to the lowest area which was knowledge seeking.  Hence, teachers should suppervise students to follow current events.  Most parants were too busy and did not have enough time to teach their children.  There were many occupational types of parents.  Bussiness owner was the career most parents had while farmer was the least.  Therefore, teachers should teach the students more.  Regarding the ethical model, parents gained the highest score compared to friends who played the least role organizing different activities for both Buddhist and Christian students could build up unity and collabaration.  Students learned to sacrifice and helped one another.  They could work together happily.