This research uses a two-stage network data envelopment analysis to explore the operating efficiency and efficiency changes of Taiwan's IC design industry from 2012 to 2016. Respectively, profitability and market ability case be evaluated by a two-stage network data envelopment analysis, and uses the Malmquist productivity index to analyze productivity during the interim period. The analysis results provided suggestions and directions for the operating improvement, the research found that the overall efficiency value of the Taiwan IC design industry from 2012 to 2016 performed better at the profitability stage than at the market stage, and was generally high in terms of profitability. Managers should focus on the improvement of the market stage to improve the overall efficiency of the company. In addition, before 2014, changes in efficiency were factors that mainly affected changes in productivity, and after 2014, productivity was declining year by year due to a significant decline in technological changes.