This study explored the positive effects of environmental commitments and green intangible assets on green competitive advantages of companies in the information and electronics industry of Taiwan. The results showed that environmental commitments and green intangible assets of companies were positively associated with their green competitive advantages. Investments in the environmental commitments and green intangible assets were helpful for the green competitive advantages enhancement. Furthermore, this study demonstrated that there were the advantage of firm size on the environmental performance in the information and electronics industry of Taiwan. This study found that environmental commitments, green intangible assets, and green competitive advantages of small & medium enterprises (SMEs) were all less than those of large enterprises in the information and electronics industry of in Taiwan. Hence, there was the advantage of firm size for the environmental commitments, green intangible assets, and green competitive advantages in this industry in Taiwan, and it was imperative for SMEs to develop their environmental commitments and green intangible assets to strengthen their green competitive advantages.