The invention relates to a vehicle 
dynamic display device and a displaying method thereof. The vehicle 
dynamic display device comprises an MEMS microaccelerometer, a vehicle state 
discriminator, a driver, a 
LED display or an EL emitting 
diode. An 
accelerometer is adopted for detecting state; an automatic decision can be performed on states of collision, 
emergency brake, urgency 
speed reduction, general 
speed reduction and acceleration through the vehicle state 
discriminator; real-time display can be respectively performed according to the urgent degree ordering in various colors, 
graphics, characters or the combination thereof; hand operation is replaced by 
automatic control, and the two signals of Preparation-Break replace break signals, so that the difficulty of 
Emergency Brake Precaution is solved. Once a vehicle is in danger, all vehicles thereafter can synchronously put on the brakes as well as the front vehicle, and an early warning time of 0.8 second to 1 second can be gained, thereby effectively avoiding the phenomena of driving too close to the car in front and serially driving too close to the car in front. The comprehensive early warning mechanism overcomes a plurality of defects in the traditional 
signal lamp and creates the beginning of mutual communication among vehicles, knowing one and others and 
safe driving. The invention has the advantages of low cost, high 
cost performance and simple installation, and is suitable for high-level installation at the 
tail parts of various vehicles and the installation of rear boxes of motorcycles and mopeds.