Since the national ideological and political work conference, the ideologist circles have been focusing more attention on "Ideological and Political Education in All Courses" in universities and colleges, have made wide and deep explorations, and have extended theoretical and practical researches on the education via courses in universities and colleges. In this paper the literature related to "Ideological and Political Education in All courses" in universities and colleges in recent years is systematically reviewed, the nature and essence of this education is analyzed from the perspective of epistemology, its boundary is clearly defined from the perspective of contradiction, its value and significance is explained from the value theory, its featured practice is discussed from the Practice theory, and its multidimensional lines are reviewed from the System theory, so that the theoretical basis and experiential references for the promotion and reform of“Ideological and Political Education in All courses”in universities and colleges can be offered.