This product is a smart echometer which aims at children health care. This team spent several years on research on the algorithm optimization that can transform the professional auscultatory sound to an easily identified graphical language on the app. Therefore, through the wireless network, parents can focus on children’s lung health anytime and get the real-time diagnostic results from doctor online. The simple operation can bring the best user experience for people. Meanwhile, the smart echometer can relieve the pressure of a lack of doctors in some remote, population concentrated areas in China.