With the continuous advancement of information technology and its deepening integration with educational teaching, online learning has developed rapidly. Online learning platforms have become increasingly sophisticated, and many universities choose Yun Class as the platform to provide diverse teaching interactions for teachers and students. To understand students' attitudes towards using the Yun Class platform for professional courses and its impact on student engagement, a survey was conducted among 80 junior college students majoring in Finance at the College of Applied Sciences, Beijing Union University, from the class of 2022. The collected data were organized and analyzed using software such as SPSS26, Amos22, and Graphpad7.0. Research findings show that students' attitudes towards using Yun Class significantly influence two sub-dimensions of learning engagement—emotional engagement and behavioral engagement. This indicates that students generally support the use of the Yun Class platform for professional courses, and this supportive attitude positively affects their learning engagement. The study concludes that Yun Class, as an aid to teaching, embodies the student-centered teaching philosophy and provides a convenient and powerful learning platform for independent student learning, which is worth promoting. It also points out that the implementation of teaching using the Yun Class platform must highlight the crucial role of teachers, strengthen supervision and guidance, focus on cultivating students' ability for independent learning, and improve the learning outcomes based on the Yun Class platform.