Although Credit Department of Farmer Associations had already undergone three financial reorganizations in the past, there are still some remains that perform poorly, if not at all mediocre in the whole financial environment. Once facing the financial market is further liberalized externally, it is quite likely that Credit Department of Farmer Associations will be merged hostilely thanks to its internal stiff, and nonflexible restrictions. In other words, the moment of truth had already come to the doorstep of Credit Department of Farmer Associations, and this is the main objective of this study to strength up the competitiveness of the institution before it is too late. This research is based on the Porter?s Diamond Theory and constructed the competitive indicators of the Credit Department of Farmer Associations by compiling expert's opinion and via the Analytic Hierarchy Process(AHP) . According to the questionnaire statisticses analytical result, influence Credit Department of Farmer Associations competitiveness key factors are : At" factor conditions " aspect for Credit Department of Farmer Associations own the enough net capital, at" firm strategy, structure, and rivalry " aspect for the financial check system that strengthen the credit department, and enhancing the system of conduct management, at "the need condition" aspect for enhancing the local brand and promoting member's loyalty,at "government" aspect for the ordinance relaxed , at" related and supporting industries " aspect for the loan of the policy project on agriculture which is authorized by government, at"chance" aspect for re-examining the credit department conduct system for cooperating to establish the agriculture treasury. The reference that expect to be a guidance for the administration supervisor organization to manage and enhance the farmers' association reputation department management.