The invention discloses a de-stressing apparatus and a method thereof. The de-stressing apparatus comprises a de-stressing part for removing stress, a detection part for detecting the performance of asample to be detected, and a control part for controlling the de-stressing part and the detection part. The de-stressing part comprises a support part, a moving part, which is arranged on the supportpart and freely moves on a face that contacts with the sample to be detected, and a knocking part, which is arranged on the moving part. When the de-stressing apparatus is used, the detection part sends the detection results to the control part in a data information mode, and the control part receives the data information, compares the data information with a preset performance value, and sends control command information to the de-stressing part so as to control the knocking movement of the de-stressing part according to the comparison result. The provided de-stressing apparatus can automatically knock a sample to be detected so as to remove the stress and detect the sample so as to ensure that the stress of the sample is eliminated.