Several military conflicts in the early 21st century opened a new form of modern war-"Hybrid Warfare." The purpose of this paper is to understand the connotation of hybrid warfare and its challenges to the traditional concept of war through the archieval study, and to find the methods of countering and confronting hybrid warfare, using thera as reference for force buildup and combat readiness enhancement of the ROC Armed Forces. The study found that the hybrid warfare reflects the current war in the information and technology era, using mixed and innovative, asymmetric tactics, techniques, and precision operation to destroy the political, economic stability and urban development of the target country, attack weaknesses of freedom of speech, and challenge the security. Therefore, it is necessary to improve the awareness and mutual trust and cooperation in order to counter hybrid threats, and be able to withstand the resilience of mixed attacks, strengthen the ability of information management and verification, and establish ability to adapt to the hybrid operations, in order to effectively respond to the threat of Hybrid Warfare.