Internet hospital is an online service, diagnosis and treatment platform that relies on the traditional hospital, and it can connect doctors and patients through Internet, providing patients with the whole process of medical service through the integration of online and offline services. To construct children's Internet hospital, the following measures were adopted: using Internet technology, we constructed a whole process online and offline child service platform; using the concept of health closed-loop management, we carried out core medical service such as online diagnosis and treatment; and based on telemedicine technology, the collaborative medical interaction service between doctors was achieved. We also created our own platform to ensure information security and children's medical experience with the help of system data interaction and cloud technology. Besides, an Internet hospital management system was established to ensure medical quality and safety. The children's Internet hospital can improve not only the medical service efficiency, but also the children's medical experience.