Objective To evaluate the effects of sacral neuromodulation (SNM) on female overactive bladder (OAB) and interstitial cystitis/ painful bladder syndrome (IC/PBS). Methods From May 2016 to April 2017, 13 patients with OAB or IC/PBS who had been treated with SNM were assessed retrospectively. Among them, 6 cases were OAB patients, and 7 cases were IC/PBS patients.The average age was 52.3 (42-67)years old, and the preoperative and postoperative 24 h urine frequency, night urination frequency and average voided volume were compared . Results Totally 13 patients underwent stage Ⅰ procedure. The operation time for stage I was 52-125min(average 92 min). After an average follow-up of 3.6 weeks, stage Ⅱ procedures were performed on responders. Four OAB patients accepted stage Ⅱ surgery (conversion rate: 66.7%), and the 24h frequency and night urination frequency reduced from preoperative 22.5 and 5.2 times to postoperative 14.3 and 2.3 times (P<0.05) respectively, and average voided volume increased from 120.3ml to 166.4ml (P<0.05). Among 4 patients presenting IC/PBS who had underwent stage Ⅱ surgery (conversion rate: 57.1%), VAS score and 24 h voiding frequency reduced from 7.3 and 21.6 to 3.8 and 16.8(P<0.05), respectively. No adverse event, such as wound infection or electrode translocation was detected during an average follow-up of 8.3 months. Conclusions Stage Ⅰ procedure is crucial for the long term efficacy of SNM. Postsurgical wound management and parameter adjustment are equal essential in order to achieve a maximum benefits. SNM has advantages in minimal invasiveness and less bleeding, which provides a minimal invasive approach for the management of OAB and IC/PBS. Key words: Sacral neuromodulation(SNM); Overactive bladder(OAB); Interstitial cystitis/painful bladder syndrome(IC/PBS)