Abstract: In order to assess and diagnose lower urinary tract dysfunction in patients and help patients with lower urinary tract rehabilitation training, an accurate and reliable urodynamic monitoring and automatic voiding system was designed. The system realizes the signal acquisition circuit of bladder pressure, abdominal pressure and urine volume based on the pressure sensor of urinary catheter and the load sensor. Meanwhile, the dynamic waveforms of urinary flow rate, bladder pressure and abdominal pressure are drawn in real time on the software of urodynamic monitoring. Signal processing and analysis of each signal are carried out, and the system performance is verified by building a simulation experiment. The experimental results show that the system is stable, reliable, accurate and meets the expected design goals, which can provide support for subsequent engineering design and clinical applications.