The case study teaching in Harvard Business School has more complicated requirements on instructor's preparing, school's facility and students' pre-class preparing than traditional teaching. The instructor needs to preview case contents, read related teaching notes, list students groups, prepare name cards, prepare self-study notes, whereas he/she is not obliged to provide solutions of the discussed questions to students. The school's facility includes big classrooms for case discussion of all students and instructor, small group discussion rooms, aisle space for tea time and additional materials and hostel for students. The student's pre-class preparing includes reading case content and related material and participating in group discussion for assignment questions. In overall, a successful case study teaching needs the coordination from all the three aspects. This study is aimed to discuss the requirements of instructor's preparing, school's facility and students' pre-class preparing and analyzes the current situation in Taiwan.