Over the past two decades, the use of case management as a patient care delivery system has gained increased popularity. It has focused on patient-centered, multidisciplinary, communication and coordination among professional healthcare providers for cost control and quality improvement. As a result, case management has been viewed as an innovative strategy which facilitates the linking of quality and cost-effective care. But, how could the case manager achieve these aims? This paper will introduce the definition of case management, as well as the role and competencies of an effective case manager. The researcher hopes this article can provide guidance and a reference to novices.