The rapid industrialization in Taihu Basin has aroused the great demolishment to the local erologiral environment. So, it is necessary to encourage the greening of industry firms actively for the regional sustainahle iltivel-opment. Based on the investigation of industrial firms and the environmental statistical data in Wuxi williin Taihu Basin, this paper analyzed the process of greening of industry. Some conclusions are inferable that under I he environmental press, the rate of pollution industry has declined and ihe environmental behavior of firms l)ecame friendly. Now governmental regulations are the main pressure to drive firms to take the environmental proletlion actions while the market factor plays the part role. The research also found that the firm environmental lieliavior has an important relationship wilh size,ownership, and location. The more massive enterprises, the betler their environmental behavior. The environmenlal behavior of state and collective enterprises are betler than those of foreign investment and private enterprises. The phase of industry greening of Wuxi is in initial stages. We need to guide and supervise the environmental behaviors of industry firms and promote the development of the greening of Industry