The invention discloses a vehicle-road cooperation method and system based on Beidou high-precision positioning, which comprises the steps that vehicle-mounted cooperation processing equipment collects vehicle driving environment information, vehicle condition data information and Beidou positioning data and transmits the information and data to roadside cooperation processing equipment or a service control platform; the roadside cooperation processing equipment generates road condition information and image positioning data and transmits the information and data to the service control platform; the roadside positioning data is transmitted to the service control platform; the service control platform carries out comprehensive positioning analysis and processing by using the Beidou positioning data, the image positioning data and the roadside positioning data, generates precise positioning data and feeds back the precise positioning data to the vehicle-mounted cooperation processing equipment. In addition, the invention further discloses a vehicle-road cooperation system based on Beidou high-precision positioning. By adopting the vehicle-road cooperation system and the vehicle-roadcooperation method of the invention, the vehicle location can be accurately positioned, the operation and efficiency of the traffic system are greatly improved, and the occurrence of traffic accidentsis avoided to a great extent.