The invention provides an online vehicle washing queuing system. According to the online vehicle washing queuing system, reservation queuing requests are sent by mobile terminals to a server, a real-time queuing number list is sent to the mobile terminals by the server according to the reservation queuing requests, and the real-time queuing number list is generated according to the reservation queuing requests of the mobile terminals received by the server and the information of vehicles arriving a store. Queuing for vehicle washing is reserved by vehicle washing-needing users through the mobile terminals to the server, the real-time queuing number list is formed by the server according to the reservation queuing requests, the list is sent to the mobile terminals, so service conditions of each store can be queried by the vehicle washing-needing users, online queuing is carried out, queuing sequence of the washing-needing users at one store can be queried, and the vehicle washing condition of the present store is mastered; the quantity of washing-needing vehicles and the time can be known by the vehicle washing-needing users and washing service providing stores, so the vehicle washing-needing users are made to arrive the store in time, queuing for long time for vehicle washing in the store can be avoided, the time of two parties can be saved, and road occupation caused by vehicle washing field queuing can be avoided.