英語教學上外語學習者第一語言的議題，已廣泛爭論多時。雖有許多研究探討英語教學該排除或包括第一語言的使用，但甚少有研究探討台灣的教學情況者。因此本研究探討英語課上師生對使用教學媒介的態度與看法，以便幫助學生學習。研究參與對象是台北某所綜合大學592位選讀英文課學生及48位授課教師。研究方法採用質化與量化，包括問卷調查及訪談。研究結果以獨立樣本T檢定(Independent-samples T-test)及單因子變異數分析(One-way ANOVA)，探求學生與中外師在英文課使用中文教學的態度。外籍教師除傾向不同意使用中文外，彼此間對中文意見亦很分歧。師生間不同的意見亦加分析，並對研究結果提出建議。

The issue of the learner’s L1 in the ELT has been extensively debated for a long time. Although there are many studies exploring the issue of exclusion / inclusion of L1 in the ELT, few studies explore the Chinese-English setting in Taiwan. This study is, therefore, done to find out the teacher’s and the student’s attitudes and opinions about the medium of instruction in the English class to facilitate the student’s learning process. The participants were 592 students enrolled in general English classes and 48 teachers of a comprehensive university in Taipei. Both qualitative and quantitative research methods are applied, including questionnaires and interviews. An independent-samples t-test was performed to ascertain NET’s and CET’ opinions on the use of Chinese, and a one-way ANOVA was applied to compare the opinions of teachers and students. In addition to the NET’s tendency to reject the use of Chinese in class, their attitudes towards Chinese use vary among themselves. The different opinions between teacher groups and student groups are discussed as well. The suggestion is made based on the findings.