The invention provides a virtual number mapping method. The method comprises the steps of building a virtual number service database according to mobile phone numbers and license numbers of car owners who open the virtual number service; when a user needs to make contact with one car owner of a car, logging into a virtual number service system, typing the license number of the car and the mobile phone number of the user in the system in a page or client mode; after the mobile phone number of the user is verified, conducting standard format management on the license number of the car, and searching the virtual number service database for the mobile phone number, corresponding to the managed license number, of the car owner; conducting calling handling according to the mobile phone number of the user and the mobile phone number of the car owner, and building calling connection between the user and the car owner after both the user and the car owner answer the call. The invention further provides a virtual number mapping system. According to the virtual number mapping method and system, other users can be prevented from directly obtaining information like the mobile phone number of the car owner, the user can conveniently make contact with the car owner, privacy information like the mobile phone number of the car owner is prevented from leaking, and good service experience is achieved.