隨著科技進步，青少年上網的比例及頻率都越來越高，但也因此衍生了網路霸凌的問題。本研究採用問卷調查，對531位七至九年級學生進行研究，以了解國中生的網路霸凌行為，及網路霸凌行為的相關因素。研究結果發現：至少有大約1/3（32.58%）的國中學生，曾在網路上霸凌他人。此外，相關與迴歸分析的結果顯示，負向情緒與國中生網路霸凌行為具有顯著相關；個人變項中的學業成績不及格、上網時間4小時以上、人間關係欠佳；環境變項中，教師專制權威的管教態度、班級氣氛不佳；以及憤怒、嫉妬的負向情緒，都會提高國中生網路霸凌的頻率。根據研究結果，本研究提出各項建議，供國民中學作為防治網路霸凌的參考。

Along with the advance of technology, the proportion and frequency of teenagers surfing the Internet are increasing, from which cyberbullying is derived. With questionnaire survey, 531 G7-G9 students are studied to understand junior high school students’ cyberbullying behaviors and the factors. The research results show that about 1/3 (32.58%) of junior high school students have the experience in bullying others on the Internet. Regression Analysis results also reveal significant correlations between negative emotion and junior high school students’ cyberbullying behaviors. Failure in academic performance, surfing the Internet for more than 4 hours, and interpersonal relationship in individual variables, teachers’ authoritarian and bad class climate in environmental variable, as well as negative emotions of anger and jealousy would increase the frequency of junior high school students’ cyberbullying. According to the research results, various suggestions are proposed in this study, as the reference for junior high schools preventing cyberbullying.