In this paper, first of all, the driving performance of QCCs(Quality Control Circles) that are stagnant during 10 years are reviewed. And the usage realities and utilization degree of quality improvement tools in the domestic activities of QCCs are empirically analyzed into size of company and type of business. Thus, this empirical study compares the results of past period in 1997${sim}$1999 with the results of 6 sigma non-adapting period in 2000${sim}$2003 through examining the collections of presentation for Korea Quality Control Circle Meetings. Also, according to the introduction of 6 sigma in QCCs activities the difference of utilization degree for quality improvement tools are analyzed to compare the results of 6 sigma non-adapting period in 2000${sim}$2003 with the results of 6 sigma adapting period in 2004${sim}$2006. Finally, the utilization degree of 6 sigma tools which follow the driving steps of 6 sigma, DMAIC, are analyzed.