This paper tries to analyze communication problems identified in workplace meetings and suggest principles to improve meeting speech and communication culture in the workplace. In many Korean workplaces, it was found that meeting dialogue is mostly one-sided, hierarchical/vertical and aggressive communication. Improved workplace meeting dialogue should tend towards rationality based on mutual understanding. Considering the theory of communication action by Habermas and the theory of critical intercultural dialogue by James, the author has tried to give shape to dialogue principles that seek rationality based on mutual understanding. The three major principles were as follows : first, a dialogue should demonstrate validity of opinions as a two-way communication. Secondly, speakers need to understand and accept the other person`s perspectives on various opinions. Thirdly, there should be no coerced suppression or dominating control over discussion, and fair conditions need to be provided.