1. A somatosensory recognition system for recognizing human body's action, comprising: an acquisition device configured to acquire a first motion track data of a body parts' action; a wearable device capable of being worn on the body parts and configured to acquire a second motion track data of the body parts' action; and a processing device configured to compare the first motion track data and the second motion track data and determine the body parts' action according to comparison result; wherein the processing device comprises an action recognition unit, a first wireless transmission unit and an action judgment unit, the action recognition unit is connected with the acquisition device and configured to recognize a first position information of the body parts from the first motion track data; the first wireless transmission unit is configured to receive the second motion track data from the wearable device and send the second motion track data to the action judgment unit; the action judgment unit is connected with the action recognition unit and configured to receive the first position information, and is further connected with the first wireless transmission unit and configured to receive the second motion track data from the first wireless transmission unit and extract a second position information of the wearable device from the second motion track data, compare the first position information and the second position information and determine a position of the body parts according to comparison result; wherein the action judgment unit is further configured to normalize the second position information before comparing the first position information and the second position information, the normalization comprising: storing an initial first position information recognized by the action recognition unit while the body parts are in stationary state; and then, adding the second position information to the stored initial first position information while the body parts are moving, so that a normalized second position information is obtained.