With increasingly severe environmental regulations, a pressing issue has been the need for firms to develop efficient strategies to achieve environmental protection and high productivity. Several environmental experts argue that firms can respond to environmental regulations through innovation; however, the question of how to innovate is unanswered in the environmental literature. Therefore, this study focuses on the open innovation strategy approach to respond to environmental regulations and maintain high productivity by incorporating the idea of innovation management. We first divide open innovation strategy into two modes of external technology acquisition: foreign and domestic. Next, we examine these modes' mediation effects on environmental regulations and productivity. In addition, we test the moderating effect of internal R&D on the relationship between external technology acquisition and productivity. Using data on 35 Chinese industrial sectors from 2001 to 2010, the empirical findings show that foreign technology significantly and positively mediates the link between environmental regulations and productivity, while domestic technology does not. Internal R&D investment, as an absorptive capacity, positively moderates the effect of foreign technology; however, it negatively moderates the effect of domestic technology on productivity. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment