The invention discloses a road network flatness 
evaluation system and method based on vehicle vibration data, and the 
system comprises a vehicle-mounted terminal which is used for obtaining the vehicle 
vibration acceleration and 
GPS positioning data of a fixed line, and transmitting the collected data back in real time; the 
cloud server is used for receiving, analyzing and storing the data uploaded by the vehicle-mounted terminal and relates to a road network flatness 
evaluation algorithm; the visual cloud platform is used for displaying the road network flatness data by utilizing a GIS (
Geographic Information System), carrying out quality analysis, report statistics, assistant decision and the like, and pushing the data to other 
system platforms; and the comfort level navigation module isused for carrying out comfort level navigation by utilizing the road network flatness data to obtain the most comfortable path between the two points. The vehicle 
vibration response data is acquiredby using the vehicle, acquisition, transmission, analysis and release are integrated, the road network flatness detection cost is reduced, auxiliary decision reference is provided for a 
maintenance management department, and meanwhile, the data can be used for comfortable 
route navigation and serve the public.