In order to cater to the reform of online platforms and improve online users’ learning efficiency, this study conducted a design and readjustment of the function of online platforms through application of AI Technology based on cognitive emotion regulation. The results show that AI Facial Recognition Technology can not only identify and regulate users’ emotional states, but also improve the learning states in the online learning process. It is effective in cultivating online users’ planning and adjusting the content of online platforms. The research put forward improving strategies of online platforms. The results mark a new direction for the improvement of learning state and lay a theoretical foundation for the design of online platforms.