In view of the problems existing in integrating online and offline teaching of Single-chip Principle and Application, this paper puts forward a design idea for smart classrooms. That is to say, the features of smart classrooms are reflected in each link of the teaching design. By introducing detailed design idea and implementation plans in the teaching of "Interrupt System of AT89S51 Single-chip", it shows the "learning-centered" teaching concept, which has reference value to the smart classrooms construction of related courses.