The invention discloses a self-service car washing device and a car washing method. The car washing device comprises a car washing device main body, a camera, a display, a
parking space lock and a central
server, wherein the car washing device main body comprises a car washing
machine, a cleaning
system and a car washing
brush, the washing
system comprises a clear water and foam device, a high-pressure water gun and a dust suction device, and the car washing
brush, the foam device, the high-pressure water gun and the dust suction device are provided with sensors; the central
server comprises ashort message module and a processor, wherein after the information received by the short message module is processed by the processor, the processor sends examination signals to the car washing
brush, the foam device, the high-pressure water gun and the dust suction device, and the processor sends information to a user through the short message module; when a car is washed, a start command is sent to a
system through the central
server, the car is cleaned after dust collection, and the car is paid or continues being washed through the Alipay after the cleaning is finished. According to the self-service car washing device and the car washing method, a plurality of self-service car washing devices are managed through the central server, no change and a magcard are needed, and downloading APP are not needed, only a two-dimensional code needs to be scanned, settlement is carried out on the Alipay, and the efficiency is improved.