The invention provides an automobile intelligent paint spraying system based on cloud computing, relating to the field of spray painting process. The problems of large paint loss, poor quality consistency, the affection of the health of operating personnel, serious pollution, low efficiency, and high cost in existing artificial painting are solved. The system comprises a cloud computing platform, multiple city service platforms, and a plurality of spraying and baking rooms. The cloud computing platform comprises a large server, a data memory, a double-wire-access type Gigabit network, a router, a switch, a data management system, an automobile spare part 3D model database, and an automobile spare part spraying program database. Each of the city service platforms comprises a high performance server, a 3D scanning device, a 3D scanning device control system, a spray piece point cloud database, an automobile spare part spraying program database, a quality inspection database, an automobile spare part spraying path planning system, and a double-wire-access type Gigabit network. Electric shutter doors are used to divide the spraying and baking rooms into spraying rooms and baking rooms. The system has the advantages of good quality consistency, no pollution, high efficiency and low cost.