本研究旨在探討桃園市高中職校長學術樂觀與教師教學成效的現況，藉由分析不同背景變項與學校變項之教師在知覺校長學術樂觀與教師教學成效的差異情形；進而探討校長學術樂觀對教師教學成效，最後根據研究提出結論。 為達上述研究目的，本研究採用問卷調查法，以桃園市33所公私立高中職之教師兼主任、教師兼組長(含科主任)、教師兼導師與專任教師為研究對象，採隨機抽樣方式，寄發問卷440份，回收有效問卷412份，有效回收率為93.6 ％。問卷所得資料採用IBM SPSS Statistics 20.0統計軟體進行資料分析，獲得以下結論： 一、高中職現職教師在年齡與任教年資的差異上，顯現出對校長學術樂觀有不同之知覺傾向 二、高中職兼任導師之現職教師對校長學術樂觀知覺較低 三、公立高中職之現職教師對校長學術樂觀知覺呈現正相關 四、高中職現職教師在年齡與任教年資的差異上，顯現出對教師教學成效有不同之知覺傾向 五、高中職兼任導師之現職教師對教師教學成效知覺較低 六、高中職之現職教師對校長學術樂觀與教師教學成效具中度顯著關係，但在「班級氣氛」層面呈現低度顯著 七、高中職現職教師在「校長學術樂觀」的「信任教師、學生、家長」與「重視學生學習」對「教師教學成效」具有較高之預測力 / This study was designed to investigate the current status of high school principal’s academic optimism, teacher’s teaching effectiveness and their relationship in Taoyuan. Base on the result of analyzing the difference of teaching effectiveness of teachers from different backgrounds and different schools, and of school principal’s academic optimism, and on the result of exploring the influence of principal’s academic optimism on the effectiveness of teacher’s teaching, the conclusion is made. To achieve the above purpose, the research uses the questionnaire survey procedure, the grand total provides 440 questionnaires randomly to teachers who are in different positions, either homeroom teachers, full time teachers, section chief or directors in 33 public or private high schools in Taoyuan, recycling effective questionnaires 412, the effective questionnaire recycling a rate 93.6%. The data obtained from questionnaires has been analyzed by using IBM SPSS Statistics 20.00 obtain the following a conclusion: 1. When high school teachers’ age and the length of teaching year vary, their perception of principal’s academic optimism differs. 2. High school teachers’ perception of principal’s academic optimism is weak if they are homeroom teachers. 3. Public high school teachers have stronger perception of principal’s academic optimism. 4. Teachers with different ages and different length of teaching years have different perception of teaching effectiveness. 5. Current teachers who are homeroom teachers have weak perception of teaching effectiveness. 6. Academic optimism of high school principals is moderate significantly correlated to teachers’ teaching effectiveness, but weak correlated to classroom climate. 7. Two parts of measurement of principal’s academic optimism, faculty trust in students and parents and the school’s academic emphasis are highly predictable to teacher’s teaching effectiveness of current high school teachers.