High technology business is the motive power of Taiwan¡¦s economic development. It creates the golden miracle of Taiwan¡¦s economic. IC industry and TFT LCD are the main force in Taiwan. Manufacture is core of these businesses. In-line operators are the fundamental of these businesses. [Four shift Two round] is the working style of these companies. It is different from the traditional industry in Taiwan. IC industries face the different labor power problem from highly growth status to mature status. The biggest change is they can't replace the new employee easily from the job market. Especially TFT industry joining, the replacement is higher in the labor power parts. It has already impacted IC industry. Mature labors select to quit and new employees are hardly to recruit. This situation made IC industry need to review their strategies of labor power maintenance. It is the most important part for each IC manufacturing company to recruit suitable new employees and keep the mature labor power. Labor power maintenance is not only the duty of human resource department. It needs to be aligned with the core value of the whole business. Concentrate the common consensus of all members and provide the labor power policy to correspond with current environment. This study is through the quit analysis and investigate to analyze the working status and system of the operators of [Four shift Two round]. Hope to provide the conclusion and suggestion for related businesses.