Purpose: The aim of this study is to analyze the preoperative and intraoperative factors that might induce systemic inflammatory response syndrome after semirigid ureteroscopic lithotripsy (SULL) , and to evaluate the impact of duration between preoperative bladder urine culture (PBUC) and surgery on postoperative systemic inflammatory response syndrome (SIRS). Methods: A retrospective review was conducted including patients who underwent SULL in our center between January 2011 and June 2020. Prior to surgery, PBUC were obtained from all patients and postoperatively patients were observed for signs of SIRS. Univariable and multivariable binary logistic regression analysis were implemented to demonstrate the factors that predict SIRS postoperatively. Results: The entire study included a cohort of 572 patients. The rate of SIRS following SULL was 1.7%. Predictive factors for SIRS were listed as stone volume, surgical time, and history of recurrent urinary tract infection. No significant difference was detected in terms of the duration between PBUC and SULL when comparing the SIRS group with the other group. Conclusion: The duration between PBUC and SULL is not an efficacious factor for SIRS. It may be useful to conduct prospective studies to enlighten this issues as endourologists deal with this duration dilemma often in daily practice. Keywords: Semirigid ureteroscopic lithotripsy, Systemic inflammatory response syndrome, Preoperative bladder urine culture