With the advent of the Internet of Things technology, the smart home has been redefined by the concept of "digital home". Especially under the circumstances of global epidemic, the Internet of Things technology can monitor the temperature and humidity of the living environment at any time through sensors, which allows people to know the temperature and humidity in their homes in time, so as to predict the potential danger in advance. The system, The Internet of Things temperature and humidity detection, is mainly designed to collect the data of temperature and humidity in the home and access to achieve communication with Mobile phone. The system, by using the Micro Python language, collects the data of temperature and humidity through the DHT11 temperature and humidity sensor, and achieve communication function with upper monitor with the help of WIFI.