This paper reviews mainly on PBL online teaching model and some online teaching practice to explore the necessity that students are supposed to acquire. The paper first introduces the conception of meta-learning skills which can be highly described as learning skills in the process of students' learning. Then, background and objectives on PBL are given in the main body to bring an initial comprehension of PBL learning. The destination of cultivating students' capacity is to facilitate them to

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... ckle real-life scenarios. In addition, the paper takes the case of University of Hong Kong and Wuhan Polytechnic as examples of online teaching to analyze how to carry out the practice of online teaching based on the teaching mode of Project-Based Learning (PBL), and then demonstrates advantages concerning independent ability, communication and collaboration ability and reflection competences, and then summarize this online PBL teaching mode.