Urodynamic study is the way of measurement for bladder information. Urodynamic study is research to filling and voiding function of lower urinary tract. The process of urination it is very complex and momentarily passing phenomena is objectively observed. This approach is not only discomfort but also complex. Accordingly, bladder monitoring systems are being studied around the world. And our research team is underway from several years ago. In this paper, mechanical bladder pressure monitoring system is improved and introduced. This system was to following flow curve graph and intravesical pressure curve graph of important factor of urodynamic study. And this system is added the regulator equipment that control the abdominal pressure, and pressure device to measure the intravesical pressure. Therefore, these simulators mimicked the human's urinary bladder were obtained as a possibility.