本研究利用大數據資料分析2020年討論度相當高的有關全民國防的四個議題：中共對臺武嚇議題、軍購議題、國防自主議題、兵役改革議題，試圖勾勒出網路社群對於全民國防意識的輪廓；同時也將各議題的訊息來源進一步劃分為五個訊息來源進行分析，釐清訊息建構的脈絡。

　　研究結果顯示，全民國防意識在社群中益發受到重視，且在共機繞臺成為常態性事件的背景下，其它國防議題所受到的關注也逐漸提升；此外，軍購議題的貼文會與我國總統大選、美國總統大選及中共對於臺灣向美國軍購之反應等事件相互扣連；國防自主議題的貼文則和我國總統大選、飛官殉職等事件密切相關。而在各議題訊息建構部分，主要訊息來源仍是以新聞媒體為主；政治人物也在相關議題上獲得很高的影響力，但國防部並未取得主要話語權。

This study uses big data data to analyze four topics that will be discussed highly in 2020, namely, the threat of the Communist Party of China against Taiwan, the issue of military purchase, the issue of national defense autonomy, and the issue of military service reform, in an attempt to outline the online community's national defense awareness. At the same time, the information sources of each topic are further divided into five information sources for analysis to clarify the context of information construction.

The results show that the national defense consciousness of the whole people is more and more valued in the community, and other national defense issues are also getting more and more attention under the background that the co-flight around Taiwan has become a normal event. In addition, the post on the issue of arms purchase is interlinked with the presidential election in China, the presidential election in the United States and the reaction of the Communist Party of China to Taiwan's arms purchase from the United States. The articles on the subject of national defense independence are closely related to the presidential election and the death of a flying officer. In the information construction part of each issue, the main information source is still the news media. Politicians have also gained a high degree of influence on relevant issues, but the defence ministry has not had a major say.