When employee turnover rate in a company is too high, not only it will result in the increase of cost, affecting employee morale, making negative impression on customers, but also impacting corporate performance in the long run. This research uses one of the qualitative research techniques to study the human resource management practices of the four interviewed companies, trying to identify the best practices they have in common that contribute to the decline of employee turnover rate or maintain it within acceptable level. After interviewing the four companies, two in service industry and the other two in high-tech manufacture industry, this research analyzed their human resource management practices, and found five best practices they have in common that help these four companies successfully keep employee turnover rate in control. Therefore this research concluded that a company, whether it is in service industry or high-tech manufacture industry, or whether its organizational culture is more performance-oriented or rather paternalistic, by recruiting employees through diversified approaches and selecting them by their personalities, and strongly linking performance appraisal system, reward system, promotion system and training and development system together, the synergy of the best practices all together will contribute to the decline or maintain of employee turnover rate.