Internet of vehicles (IOV) is a large interactive network composed of vehicles' position, speed, route and other information. Through global positioning system (GPS), radio frequency identification (RFID), sensor, camera image processing and other devices, the vehicle can complete its own environment and state information collection; Through Internet technology, all vehicles can transfer all kinds of information to the central processing unit (CPU). Through computer technology, this mass of vehicle information can be analyzed and processed to calculate the best route for different vehicles, timely report the road condition and so forth. The development of IOV will have a comprehensive driving effect on social construction in many aspects, such as intelligent traffic management, energy conservation, emission reduction and safe driving. In general, mature industrial base, huge consumer market and important strategic significance make the IOV become the focus of large-scale development and application of the IOV in the industry in the world, which has won strong attention from all parties. There is no strict definition for the so-called IOV. To put it simply, it is to realize the coordinated interaction of people, vehicles, roads and the environment through wireless communication and other means by taking cars as nodes in the information network, so as to realize intelligent transportation. However, since its birth, the IOV has always been faced with the lack of a unified management situation. In this paper, we studied the main technology involved in the IOV, the existing problems and so on.