Abstract-Blended learning as a combination of traditional and on line learning has aroused educators' great attention, but its definition, the theoretical foundation, the concrete application need to be studied further. This paper aims to make teachers and students have a better understanding about blended learning, analyzing the definition, the theory, teaching practice, influences on the teacher-student relationship and the most barriers in blended learning by the method of questionnaire and interview. Although the result shows some obstacles that need to be overcomed by teachers and students, blended learning will be accepted as an effective approach to maximum the classroom efficiency in the digital world.