In the ideological and political theory courses reform of the blended teaching, the course of Introduction to the Mao Zedong Thought and Theoretical System of Socialism with Chinese Characteristics quotes the concept of four quadrants of mathematics and takes the class as the axis at the meantime takes the internet as the vertical in order to divide the teaching scene into ⅠⅡⅢⅣ quadrants. Then build out the four teaching scene.