Abstract: In order to improve the accuracy and operability of Six Sigma Business Scorecard (SSBS) method, the model of enhanced SSBS based on entropy weight and relative approach degree was proposed. For overcoming the lack of specific method in determining the indexes weight, entropy weight theory was introduced to modify the subjective weight which improved the accuracy of the index weight determination process in SSBS. Moreover, approach degree theory was also introduced to figure out the sigma value and relative approach degree between two levels based on vector standardization which enhanced the evaluation value determination method of six sigma business scorecard. Lastly, a demonstration example was analyzed the validity of this method is proved.