本研究旨在探討國民中小學校長螺旋式領導對其專業能力發展之間的關係。除探討國民中小學校長螺旋式領導、校長專業能力發展的內涵及現況，瞭解教育人員人口變項及學校背景變項在校長螺旋式領導及專業能力發展得分的差異情形外，亦分析校長螺旋式領導與專業能力發展之相關程度，並探討校長螺旋式領導對專業能力發展的預測情形。 本研究係以臺北縣市、桃園縣、基隆市與宜蘭縣等五縣市之國民中小學教育人員為研究對象，以「國民中小學校長螺旋式領導對其專業能力發展調查問卷」為工具進行研究，內含基本資料、國民中小學校長螺旋式領導問卷及專業能力發展問卷三部分，具有良好的信度、效度。正式施測有效樣本421位，分別以描述分析、t考驗、變異數分析、積差相關分析、多元逐步迴歸分析等統計方法進行分析，並得到以下數項結論： 一、國民中小學教育人員在知覺「校長螺旋式領導問卷」的總得分上，屬於中上程度，在各向度之得分中，以「膽識」最高，最低則是「感召力」。國民中小學教育人員在「專業能力指標問卷」的總得分上，亦屬於中上程度，在各向度之得分中，以「校務發展」最高，最低則是「教學領導」。 二、教育人員人口變項與學校背景變項中，性別、年齡、服務年資、職務、學校層級及學校所在地在校長螺旋式領導問卷上，均具有顯著差異。 三、教育人員人口變項與學校背景變項中，性別、年齡、服務年資、職務及學校層級在校長專業能力發展問卷上，均具有顯著差異，僅學校所在地無顯著差異。 四、教育人員知覺校長螺旋式領導問卷之得分中，低、中、高三組在整體專業能力發展及專業能力發展各向度上，均有顯著差異；同時，不論在整體專業能力發展或各向度的得分上，高分組均顯著優於中、低分組；中分組顯著優於低分組。 五、校長螺旋式領導及各向度，與專業能力發展及各向度間呈現出顯著的正相關，亦即教育人員知覺校長螺旋式領導行為愈高，則校長專業能力之發展也愈佳。 六、在探討校長螺旋式領導各向度中，以想法、價值觀、感召力及膽視等四者對專業能力發展之聯合預測力最佳，尤以感召力最具有預測力。 最後，本研究擬根據上述研究結果進行分析討論，以形成結論及建議，並提供教育行政機關、國民中小學校長及未來相關研究之參考。 / The purposes of this study were to explore relationships between the cycle of leadership and professional competence for principals of elementary and junior high schools in Taiwan. The fist were to explore the reality for the cycle of leadership and professional competence for principals in schools. Secondary, the researcher also investigated the differences of school staff’s demographic variables and schools' background variables among the cycle of leadership and professional competence for principals in schools. Thirdly, to analyze the relationships among the cycle of leadership and professional competence for principals in schools. Finally, to explore predictive power of principal's the cycle of leadership on professional competence development in schools. This study employed the survey method. The subject were 421 educational staff randomly sample from 59 elementary and junior high schools in Taipei city, Taipei county, Taoyuan county, Keelung city and Yi-Lan county . Data were analyzed using the method of descriptive and inferential statistics, included Frequencies, t-test, ANOVA, Correlation analysis, and Multiple stepwise regression analysis. The major findings were： 1. There is above average perception for the cycle of leadership and professional competence for principals in schools among the elementary and junior high school staff. 2. Significant difference existed among the gender, age, seniority, position, school level and school district for principal's the cycle of leadership. 3. Significant difference existed among the gender, age, seniority, position, and school level for chaotic dynamical system in schools. 4. Significant difference existed among low, middle, and high teachers' perception of the cycle of leadership and professional competence for principals in schools. 5. Significant positive correlation between the cycle of leadership and professional competence for principals in schools. 6. In regression forecast of principal's the cycle of leadership to professional competence for principals in schools, especially the variable of “emotional energy” has the biggest predictability. Based on the results of this study, to make some suggestions for educational administration, the junior high school principals and future study.