The iot app, a public service that provides online services to individuals, enterprises and organizations, business services, smart terminals and user management capabilities, was launched on 18 august 2016. Following an eco-civilization approach, the development of an industry that explores low-carbon, environmentally sound, water-efficient and sustainable development, and the introduction of a car wash service, each car uses only one tenth of the amount of water that it needs to be cleaned in a real shop, is a real reduction in the use of water resources and the protection of the environment, starting with the small matter of each car wash. By 2019, china already had 220 million motor vehicles, and car wash fees had become an essential consumer expenditure for the car community, with enormous market potential. However, a large proportion of the city's drivers are early and late workers, who are more in need of flexible car wash services. The real need to do so is to save the car owners time and improve their efficiency, when the door-to-door car wash service undoubtedly provides the owners with a new model of car wash service and offers more opportunities for car doors and technicians to upgrade the car industry. The chao da have brought together industry interior network engineers, mobile internet talent, ownership of chain equipment development, large internet data platform development capabilities, ensuring a secure and reliable platform, providing professionally supportive services to drivers, and also providing a powerful platform for technicians to generate new income. A new and convenient car wash is used: the owner makes an online appointment — the system automatically sends the order — to the nearest shop attendant. After receiving the order, door-to-door car wash services will be provided at the owner's single address during the time. The door-to-door car wash service now covers most of shanghai and the uncovered areas are continuously being developed. These new types of car wash have yielded many positive results compared to the short and peak hours of operation of ordinary car washes. Using the saas gate management platform and the shared dual model, the platform also allows the service provider to set up a new system of door-to-door car wash services, which provides real-time access to information on the owner of the service, real-time access to performance and performance indicators, etc., and real-time detection of nearby service requirements by technicians, i. E., instant navigation, one-key unlocking devices, and clear service settlement。