The course of C language in the specialty of the computer science and technology is transferred to the embedded platform to prompt the teaching effect.Correspondingly, Keil C is used as the development environment, and the new experiment board with a serial of external peripherals is designed based on the 8051 family MCU.The case teaching method is adopted to increase the appeal, in which the full knowledge of C language is trained. By forming the practical systems or devices with C language on the boards, the students' passion is stimulated for programming due to their recognition for the power and practicality of C language.At last the students are familiar with C language, and begin to cognize the embedded system.