Recently, the government has promoted the organizational reengineering of national defense, and then relaxed the recruitment standards for voluntary military. The relaxation of standards makes voluntary military is not recognized in the workplace, and will have many problems to adapt in a high pressure environment. In addition, it also leads to a significant increase in the number of young voluntary military who be demobilized. Eventually, the employment situation is not good and to occur the human resources wasting. A quantification method was chosen, to study the relationship among career self-efficacy, career adaptability and human capital when voluntary military facing retirement issues. The study may be of importance in understanding the influence of cumulative human capital with career self-efficacy and career adaptability, as well as in providing voluntary military with a better way of career planning. The method to carry out this study was using a survey technique, subjects were masters, PhD students, administrative colleagues and political warfare leaders in the National Defense Medical Center, through the descriptive statistical analysis, reliability and validity analysis, analysis of variance and correlation analysis to study and explore. The pretest-posttest design was 205, 191 valid samples, 14 invalid samples as well as the rate of valid return were 93.1%. The results were: (1) career self-Efficacy was correlated with career adaptability; (2) human capital was not correlated with career self-Efficacy; and (3) cumulative human capital has not a predictive effect with career self-efficacy and career adaptability.