Solar energy industry is an important industry for long-term renewable energy development. The purpose of this study is to measure the relative efficiency of 15 publicly traded solar energy equipment manufacturers in Taiwan with data from 2010-2013. In this study we applied two stage data envelopment analysis approach to explore the profitability and marketability efficiency of 15 solar energy companies. In addition, the decision-making matrix is applied hereafter to provide further insights about the operational weaknesses, necessary improvement directions. We also utilizes Malmquist productivity index to analyze overall total factor production change from 2010 to 2013 and furthermore propose the managerial decision-making matrix to provide suggestions in order for managers to improve their operation performance.