The innovative design significantly reduces the burden involved in home medical care incurred by both medical personnel and patients in measuring the amount of residual urine. The wireless probe has improved the maneuverability, which is guaranteed to significantly impact the design of ultrasound imaging diagnostic system in the future. We highly regarded the thorough pursuit of usability and reliability of the post void residual test in terms of both hardware and software, including an easy-to-hold probe, simple imaging on the mobile terminal and automatic urine measuring system.