Abstract: Derrida’s deconstructionism rethinks “meaning” in a way of liberating it and reliving its infinite possibilities.In a word,deconstructionism liberates meaning which has been sealed off by metaphysics of presence for a long time.While construction and communication of meaning is just the right core of the science of communication,Derrida’s deconstructionism actually builds an emancipation philosophy of communication.This philosophy of communication emphasizing decentralization and variation can enlighten us to revert meaning’s freedom in human communicating activities,attach importance to individuality and spirituality of meaning in communication research,and construct diversification in communication circumstances.In the course of promoting the free reconstruction of human culture,the science of communication is hopeful to advance itself to an emancipation humanities subject.

Key words: Derrida, deconstructionism, communication philosophy, meaning