The invention discloses a vehicle detection and identification system based on a plurality of MEMS sensors and a method thereof, wherein the system can carry out real-time detection and identification for moving vehicles and has the functions of speed detection and traffic detection. The invention comprises a group of MEMS-sensors detection device used to detect moving vehicles, a power supply device used to supply working power supply for the MEMS-sensors device, a signal acquisition device used to convert analog signals output from the MEMS-sensors detection device to digital signals, a signal processing device used to carry out vehicle detection and model identification for digital signals, a display device used to display identification results. Trials verify that the invention can accurately reflect characteristics of various vehicles, can identify and display vehicle models, and can accurately display the results of speed and traffic detection. The invention is not influenced by outside weather, climate, light and other factors and has the advantages of small volume, low cost and low power consumption, thus has a wide application prospect.