The World Health Organization advocates three aspects of ＂active aging＂-health, participation and safety, to improve the quality of life of the elderly. The purpose of this study is to deeply explore the health literacy of active aging among middle-aged and elderly soldiers, focusing on the participants' cognition, understanding and application of active aging. A total of 20 middle-aged male active duty soldiers aged 45-65 years (average age: 47.6 years) were selected by intentional sampling, and two focus group interviews were conducted using the interview outline as a research tool. The results of the study found that most of the research subjects had never heard of or had contact with the concept of ＂active aging＂, but after the interaction, the interviewees believed that active aging was feasible, and said that the physical body should not degenerate, and should take it easy in their daily livings. Positive aging attitudes such as developing interpersonal relationships, wishing to continue working after discharge, actively arranging leisure activities, and maintaining a strong physical health are the important parts for future healthy ageing. In terms of active aging awareness, most of the respondents said that health is the most important priority, whether it is now, retired or in old age. The determination to stay away from the metabolic syndrome (chronic diseases), but has not yet faced the problem of aging, and the implementation strategy needs to be improved. This study suggests that the research subjects generally have correct concepts on active aging-health awareness, but there are hidden concerns. How to counsel and actively implement the practice of active aging for this group of people needs further follow-up research.