In recent years, with the gradual increase in the importance of professional certificates, improvement in certification tutoring systems has become more important. In this study, we have developed a personalized ubiquitous multi-device certification tutoring system (PUMDCTS) based on "Bloom's Taxonomy of Educational Objectives," and applied it to help students obtain HTML certificates. The system can help students learn more effectively and acquire certificates more successfully through the mechanism of personalized strengthening practice and the function of the learning diagnostic light table. The experimental results show that, compared with the control group, the experimental group has significantly better cognitive test scores. Meanwhile, from the interviews, it was also found that the students generally believed that the multi-device design makes it more convenient for them to use the system, and the learning diagnostic light table can make them more aware of their learning status.