Abstract: The disclosure provides a carbon footprint estimation method and system for a vehicle. The method includes the following steps: S100: establishing a carbon footprint model of the vehicle; S200: dividing the carbon footprint model into a first module and a second module, wherein a carbon footprint of the first module can be obtained from a database, and a carbon footprint of the second module cannot be obtained from the database; and S300: estimating, based on the carbon footprint model, the carbon footprints of the first module and the second module in a production stage; where step S300 includes the following sub-steps: S301: obtaining the carbon footprint of the first module in the production stage from the database; and S302: estimating, based on dimension parameters and materials of the second module, the carbon footprint of the second module in the production stage.