The main objectives of this research  are:  i) to study  the  efficiency  administration  of  Buddhist  Sangha  Administrators in  Phachi District,  Ayutthaya  Province;  ii)  to  compare  the  efficiency  administration  of  Buddhist  Sangha  Administrators  in  Phachi  District, Ayutthaya  Province,  classified  by  personal  status;  and  iii) to  study  the  problems and  suggestions  of  study  the  efficiency  administration  of  Buddhist  Sangha  Administrators  in  Phachi  District, Ayutthaya  Province. The  research  is survey research.Data collections are conducted using questionnaire with 226 targets of  Buddhist  Sangha  Admistrators, the  Buddhist  priests,  novitiates and  the  Buddhist who  lived  5  districts in  Phachi  District, Ayutthaya  Province, selected by purposive Simple Random Sampling Technique. Data analysis was conducted using Statistical Program for analysis of Social Science data.  Statistical values of Frequency, Percentage, Average and Standard Deviation were described. t-test was used for two variables. F-test with One-way ANOVA was employed for at least three variables. Statistical significance was conducted using Least Significant Difference (LSD) with 0.05 level of significance.

Results of the Research were concluded as follows :

1). The efficiency administration of Buddhist Sangha Administrators in Phachi District , Ayutthaya  Province  was found at the high level (  = 3.69). When considered in each aspects, it was also noticed at the high levels in all aspects,  namely,  i) The maintenance  of  the  temple, a good management  of  treasure  religious  was  found  at  the  high  level  (  = 3.75),  ii) The governing and monitoring the  Buddhist  priests, novitiates and  the  Buddhist who  lived  in the temple  following the disciplinary rules of the Sangha Association was found at the high level (  = 3.74),  iii) To engaged in education and teaching the disciplinary rules for the  Buddhist  priests,  novitiates  and  the  Buddhist was found at the high level (  = 3.64),  iv) Convenient to make  merit  was  found  at  the  high  level  (  = 3.63).

2). With  regard  to  comparison of The  efficiency  administration  of  Buddhist  Sangha  Administrators  in  Phachi  District,  Ayutthaya  Province, classified by the personal status : age, duration of ordination, degree of General education, degree of Dhamma education, duration of holding a position, location of the district and personal status of  questionnaire it was found that Buddhist  Sangha  Administrators  in Phachi District, Ayutthaya Province with the different of age, location of the district was statistically different at 0.05 level of significance, therefore the hypotheses were accepted. However, Buddhist  Sangha  Administrators  in Phachi District,  Ayutthaya  Province with the different of duration of ordination,  degree  of  General education, degree of Dhamma education, duration of holding a position  and personal status of  questionnaire  was not statistical significance,  therefore the hypotheses were rejected.

3) For the problems,  the suggestions of effective development about The  efficiency  administration  of  Buddhist  Sangha  Administrators  in  Phachi  District,  Ayutthaya  Province,  it was found that :

The problems were as follows:  i) The maintenance of the temple , a good management of treasure religious, such as no enough budget for supporting,  ii) The governing and monitoring the  Buddhist  priests, novitiates and  the  Buddhist  who  lived  in the temple  following the disciplinary rules of the Sangha Association,  such as lacking of clear rules for cohabitation,  iii) To engaged in education and teaching the disciplinary rules for the  Buddhist  priests,  novitiates and  the  Buddhist,  such as the Buddhist  priests and novitiates had a few knowledge for  Buddhism propagation  iv) Convenient to make merit,  such as lacking of participation of the  Buddhist to make merit.

The suggestions of effective development about The  efficiency  administration  of  Buddhist  Sangha  Administrators  in  Phachi  District, Ayutthaya  Province offers the following guidelines:  i) The maintenance of the temple, a good management of treasure religious, such as funding and local resources to support,  ii) The governing and monitoring the  Buddhist  priests,  novitiates and  the  Buddhist who  lived  in the temple  following the disciplinary rules of the Sangha Association,  such as there should be  rules and charts for administration together,  iii) To engaged in education and teaching the disciplinary rules for the  Buddhist  priests,  novitiates and  the  Buddhist such as there should be  projects to train and get knowledge to the  Buddhist  priests,  novitiates and  the  Buddhist for  Buddhism Propagation,  iv) Convenient to make merit,  such as enforcement of religious rules to make merit  for practice guidelines.