A new method of measuring vibration is proposed based on Doppler effect with coherent detection when the objects to be measured are incidented on by laser beams. By the means of this method, it is possible to obtain information about displacement, velocity and vibrated frequency of the objects. This approach allows a non-contact measurement of small vibrations in a far distance. A series of experiments have been done. Vibration signatures from the object were obtained using a coherent CO2 laser radar.. Experimental results show that it is a possible method to distinguish a object by means of vibration measurements in the distant range.