In the Knowledge-based Economy Era, knowledge is a very important competitive, developmental, and surviving base for individual, enterprises, and countries. Knowledge economy emphasizes how and what to get knowledge at school. Therefore, teachers of business institute of technology in Taiwan must use new teaching methods to teach “adult students” In Taiwan, “investments” is an important course at business institute of technology, especially in recurrent education of vocational education. Therefore, this study want to research and explore the best teaching method for it. According to this research, “team teaching” is a good teaching method. So, teachers of business institute of technology can try to change traditional teaching methods and adopt it. This teaching method can help teachers to improve teaching efficient.