本研究以學校組織與決策模式理論為經，一所山區特偏國小校長之個案為緯。透過訪談與實地參與觀察的質化研究，分析學校組織在運作的過程中，對於與學校相關的「事件」，校長如何進行決策，決策形成過程與影響，其他教師之反應與知覺，進而與學校組織之特性、決策模式之相關理論交互分析研究，探討其小所呈現的意義，以研究學校組織中校長的決策行為。依據本研究，個案校長的決策行為具有：一、科層體制中權威階層、法規條例、書面檔案的特性； 二、比較不具有科層體制中專職分工、不講人情、資源控制的特性:三、符合鬆散結合系統與雙重系統理論的特色。影響個案校長的決策行為的因素為：一、校長個人的價值理念；二、教師同仁的意見；三、社區家長的看法。最後研究者歸納主張，個案校長決策行為的歷程傾向行政決策模式。

　　　　　This study bases the school organization and the decision mode as longitude and bases the principal of the elementary school in very remote mountain areas as latitude. Through a qualitative research such as interview and actual participation and observation, we analyze how the principal to make decisions for r events~ related to the school in the school organization operation process and what kind of reaction and consciousness other teachers have for decisions formation process and its effects. We further process an interactive study by analyzing such theories as in relation with characteristics of the school organization and the decision mode to explore what meanings it presents in study. According to this study, the principal's decision mode in this cast has following characteristics: 1. Authority class, regulations & laws and written files in the bureaucracy. 2. Less specific duty division, unsympathetic & unkind and resource control in the bureaucracy. 3. In keeping with a loosely coupled system and a dual system theory. The factors affecting the principal' s decision behaviors are as below: 1.The principal' s personal values and minds. 2. Teachers' and colleagues' opinions. 3.Thoughts of parents or guardians of students. At last, the researcher concludes and claims that the course of the principal's decision behaviors in this cast is inclined to an administrative decision mode.