A service quality scale for PX Mart in Taiwan has been developed based on a Chinese cultural setting. The developed scale has four dimensions along with twenty four items. Later, this Chinese cultural-based service quality scale is applied to measure the service quality for PX Mart, and importance-performance analysis (IPA) is then used to identify major strengths and weaknesses of service items. From managerial viewpoints, ten items belong to major strengths such that the management can relentlessly enhance these items to gain competitive advantages over rivalries. In contrast, two major weaknesses which belong to interpersonal aspects of service during the process that Chinese customers in Taiwan are concerned most are identified. Therefore, these two drawbacks should be addressed in order to reduce customer dissatisfaction and provide better services.