Course Pin is a social platform that integrates badges, mobile applications, AR and task screens to promote interdisciplinary connections among students. Interdisciplinary cooperation and communication are important ways to promote academic development and improve students' abilities. Although students have a large number of collaboration needs, most students only know a small number of students from other majors. Students wear badges marked with their majors as accessories to their student IDs, converting their needs into "tasks" that can be posted and accepted on the platform or the terminal screen, and finding teammates based on interests and skills. The system uses game-like mechanisms and incentive systems to increase participation. Social anxiety can be reduced through the interaction of physical tags and digital platforms, and students from different majors can be helped to meet, communicate and collaborate, breaking down disciplinary barriers and transforming scattered needs into real collaboration on campus.