In July 2019, the PRC released "National Defense in the New Era" on the National Defense White Paper, which has attracted considerable attention at home and abroad. It is worth to pay attention that this white paper is the first white paper to address statements of PLA organization and its defense policy after military reform and the white paper has its own official significance. This article explores the positioning and significance of the PRC's national defense white paper, and attempts to analyze the standpoints and attitudes of the white paper from the perspective of departmental interests. It's expected to enhance our understanding of PRC military affairs.