Abstract: The task-driven teaching method is based on the constructive learning theory.It is used in the teaching of microcomputer principle and applications course.The emphasis and difficulty points of knowledge system in this course are run through the total task.Students are taken as the main subject which can mobilize their ability of autonomous learning,thus it can and improve the effect of learning.The practical teaching testify that this teaching mode not only can make students understanding of the course knowledge more thorough,and improve students’ comprehensive abilities of developing software and hardware,but also can cultivate there innovative spirit.