We propose a new kind of 3D laser Doppler motion measurement technology. The technology is based on the Doppler, He-Ne laser makes polarized light, through the carrier modulation and demodulation signal, gets the vibration information of the object, and through the vibration unit, automatic focusing system, 3D information algorithm of five beam signal and synchronous data acquisition subsystem, finally realizes the non-contact, across scales, high precision 3D measurement. The technology overcomes weaknesses of the traditional non-contact sensor narrow band range, low vibration precision, not suitable for testing of lightweight, soft defect of the object, and can realize the 3D vibration measurement of the narrow space, electromagnetic interference, micro vibration, impact.