Instead of market data, our research focuses on fund managers as involving the research topic of investment ability. We use the method of Behavioral Event Interview and Thematic Analysis to build the competency model of stock fund managers. According to the research results, the competency model includes 9 categories of competency indicators:self-awareness, behavior control, learning ability, emotion control, game ability, knowledge and skills, personality appropriateness, logic and analytical ability as well as sociability. These 9 categories of competency can be divided into 12 second-level competencies. They are correct attribution, independent decisionmaking, investment discipline, self-control, summary of experience, calming mood swing, compressive capacity, investment intuition, research ability, interest & passion, macroscopic analysis and information collection. The study of fund manager competency model represents a breakthrough in the study of special talent competency models. Theoretically and practically, this study provides a theoretical tool of evaluating fund managers' investment capacity and predicting their future earnings, which can be used by the fund companies to select talents and the fund investors for proper investment decision-making.