The traditional basic thermometer needs to measure the oral temperature regularly every morning, and the use experience is not good. Limited by the form and use of the product, the improvement and upgrading space of the traditional basic thermometer for the above problems is limited. With the popularity of smart wearable products in recent years, we have also designed a ring product that can detect the user's body temperature at night and record its trend under this trend, so as to achieve the purpose of preparing for pregnancy.