The invention discloses an Internet of vehicles system with link protection. The Internet of vehicles system comprises a vehicle alarm device, a vehicle-mounted GPS positioning device, a parking lot terminal, a signal repeater, a fault vehicle-mounted terminal, a relay vehicle-mounted terminal, a radar, a remote terminal processing system, a road video monitor, a vehicle private network, Internet, a mobile communication network and an Internet of vehicles service center. According to the Internet of the vehicles system with the link protection, traffic accident information, weather information, and traffic and roadside parking lot information can be collected in time, and a driver can be informed of the collected information, so that the driver can change a drive route in time in order to save the driving time and relieve the traffic pressure. Moreover, data relay forwarding is performed between the fault vehicle-mounted terminal and the mobile communication network, so that the phenomenon that an Internet of vehicles service provided by the Internet of vehicles service center cannot be acquired from the Internet when a communication fault occurs between a certain vehicle-mounted terminal and the mobile communication network is avoided, and the service reliability of the Internet of vehicles system is improved. The Internet of vehicles system is convenient for a large number of users to popularize and use.