In software, the function and usability of the product are the top priority but the quality of the software including all of these factors is the most important factor in the life cycle of the software. Especially, the software market has grown explosively since 2002 when system intelligence has been launched in earnest, and will become a bigger market after 2020 when the fourth industrial revolution is expected to start. The use of such software will be even higher in the Fourth Industrial Revolution and it will surely be the determining factor for the completion of the Fourth Industrial Revolution. Therefore, increasing the quality capability of software has become a pending issue in industry not just software. Unlike the emphasis on the importance of software, building a systematic software quality management system and a quantitative software development management system is delayed due to cost problems. Also, the perception of system users` quality of software is not analyzed accurately. In this paper, we analyze the quality characteristics of software and propose improvement of quality capability of software by comparing and analyzing cases of improving quality competitiveness of domestic and foreign companies.