Vehicle navigation system and method based on mobile IP phone

The invention discloses a vehicle navigation system and method based on a mobile IP phone. An IP call is established between a mobile phone and a background server, so that the information between the mobile phone and the background server is transmitted through an IP phone data channel, e.g. destination information, dialing substitution number information and voice information are acquired through the IP phone data channel, a mobile phone voice channel is not needed, and expense is saved for a user. Moreover, the invention further provides an improved scheme of providing a dialing substitution service for the user, and calling can be realized once the user tells the dialed number or the user name, manual operation of the user is not needed, and the system and the method are simple and convenient; and a vehicle early warning service is also provided, the vehicle information is acquired, the background analyzes the vehicle information to acquire potential dangerous items and then informs the user, and the user can eliminate vehicle faults according to the prompt, so that the driving risk is reduced, and the driving safety of the user is guaranteed.