Based on the Yin-Yang Wuxing Management, the test scale for vocational aptitude probe was designed. The Wuxing theory was derived via observing the nature by ancient Chinese people. It is made up of five elements, each one of them can interact with one another either in the cycle of mutual generation or in the cycle of mutual restraint. The logic undermines it, allows the construction of guidelines for the selection of personnel for an organization; more over, it allows the leader to find the one who deserves training. In addition, it helps one person to understand the strengths and weakness of one self and then to seek a suitable career. In this study, we made in-depth interviews with three staffs coming from different industries and brought back the questionnaires completed by their employees, respectively. Further careful analysis of these three cases revealed some of the correlation of the triad: work demands, characteristics of individual, performance of the individual. These data may provide suggestions for an organization to recruit coworkers or to improve oneself for job pursuit.