Therefore, “Property management business” bound to improve the operational performance to survive. Harvard Business Review（HBR）mentioned that the enterprise could apply Balanced Scored card（BSC）to monitor the performance during the economical depressed. In the past, the performance evaluating put too much emphasis on the financial performance, but BSC specifies the strategies of the organization and simultaneously stresses the balance of the performance of financial and non-financial. Based on the above, the research builds a performance evaluation system of “Property management business”. Furthermore, based on the features of property management business, we have not only built an internal performance evaluating module, but also built an external on-site performance evaluating module, and integrated the two modules into a complete performance evaluation system. This research has chosen a more suitable KPI based on the Taiwan’s property’s characteristics from many expert interviews. The indicator weight was decided by the Analysis Network Processing（ANP）and the questionnaires filled out by the experts. The researcher has also built a friendly user interface to make the proprietors and the superintendents’ use easily. In this system, the users evaluate the performance using FUZZY algorithms comprehensively, and calculated a precise grade of performance. After completing the performance evaluation system, we applied it to a case property management company in Taiwan and confirmed the availability. We expect that property management companies in Taiwan can apply this performance evaluation system to monitor their operating performances, contribute to the decision-making and advance the competition power.