Dialogue education is not merely a teaching method or education theory, but also guides and emancipates the mind, maintains and upholds speech liberty, regulates and practices democratic discourse, which reflects the universal rights including the liberty of thought, speech and communication, furthermore, contains the political philosophy significance of citizens liberty and social liberty. The reflection and critique in which critique pedagogy debates the thought of dialogue education with liberalism pedagogy reveals the historic, reality and sociality of its free spirit .