Disclosed is a lane changing and 
overtaking assisting method and 
system based on inter-vehicle communication. The method is characterized in that inter-vehicle communication is built among different vehicles, 
information support is provided for lane changing and 
overtaking is provided for drivers of the vehicles through information interaction, the inter-vehicle communication is achieved through short-range communication protocols, when a driver triggers a lane changing and 
overtaking event, a 
system identify and process the event and transmits the same to a specified vehicle, and the vehicle received the event restores the event and displays the same as prompt information which can be identified by the driver of the specific vehicle. The 
system comprises an event identifying module, an event 
processing module, a 
wireless communication transceiving module, an event restoring module, a 
user interface module, and a hardware system formed by a 
wireless communication device, a positioning device, an antenna, an 
information processing system and a touch screen. By the method and the system which can be normally used under conditions of 
bad weather and bad vision, 
driving safety can be increased effectively.