Based on survey data, this article investigates the relationships between stakeholders' pressures, firms' environmental management activities, green competencies and performance by performing a partial least square analysis. The findings of this study are as follows. First, trade association, consumer and government pressures derived from institutional environment have positive influence on firms' regulatory compliance activity, competitor and consumer pressures derived task environment have a positive influence on firms' innovation activity. Second, firm's innovation activity responding to environmental pressures derived from task environment makes a significant contribution to the development of its organizational green competency and the enhancement of its performance. However, firm's regulatory compliance activity responding to environmental pressures derived from institutional environment is not a significant factor affecting the both. Third, firm's green competency produced by its innovation activity can be sources of performance.