The modern day is witnessing rapid development of interest in health following the improvement of medical treatment technology as well as of the standard of life. Increasing demand for cutting-edge IT technology for health service is based on the desire better life. It changes the focus of health care service paradigm from treatmentoriented suppliers to consumer who requires preventive healthcare and wellness. Although widely distributed smart devices are used to provide smart health care service in order to keep pace with this paradigm change, it suffers from lack of integrated service system. The most universal touchstone to measure patient's state is body temperature, blood pressure, heart rate, oxygen saturation level, stethoscope, etc. Basic medical instruments are kept in many homes for family health. However, most personal medical equipment so far is stand-alone products which cannot keep tracks for family health issues. u-Healthcare system for smart phones uses vital-integrated communication module. This smart application for diagnosis system sends body sounds and signals (temperature, blood pressure, heart rate, oxygen saturation level, and stethoscope) to smart phone for diagnosis regardless of time and place. This study describes hardware construction of the diagnostic system in detail and argues new concept of diagnostic system environment via a smart phone application.