As the theory for analyzing the complex interaction between media and culture, although Harold Innis’ Theory of the Bias of Communication has limited explanatory power and is in the dilemma of theory failure in the current Internet era, its insight analysis and profound criticism of imperialism and culture from the perspective of media are worth extending and developing. This article pointing out the root cause for this theory failure at present is that Innis used the concept of the media in a priori way, which lacks the discussion about its philosophical essence, leaving a blind spot in analysis path of the bias of media communication. Therefore, based on the monism of materialistic dialectics, this article intends to reflect and analyze the philosophical essence of media for extending the field-theory analysis path of the bias of media communication, which provides a hitting-point and the perspective of communication theory for the study of cultural imperialism.