This Study use firms listed in the Taiwan Stock Exchange and Over-The-Counter from 2017 to 2019 as a sample, and uses "Accounts Payable Payment Days" as the proxy for supplier relationship. Regression analysis method is used to test the correlation between supplier relationship and the company's operating performance, and further explore its relationship with the Turn Loss into Profit impact. The empirical results show that the strength of supplier relationship has a significant positive correlation with the company's short-term business performance, and a significant negative correlation with long-term business performance. In the original loss-making enterprises, there is a significant positive correlation with the subsequent turnaround. In the process of business operation, supplier relationship management should be done well, and suppliers with high intensity should be treated cautiously, so as to reduce the uncertainty in operation.