|With the raising curve of personal income and lifestyle changing, buffet restaurant is quite popular, and even become a general choice for family fair customers. Therefore, customer is not only paying more attention to tasting feature and interior decoration, but expecting special invisible service. Although many papers were trying to improve customer satisfaction through proposing research, but fewer researches had discussed the systemized service framework. This research establishes key service factor framework through qualitative method, and prioritizes the weight of each dimension, category, and item in framework. So, this research can assist manager to make decision accurately, improve strategy quality, and construct competitive service framework.