讨论了科学、技术、工程、产业的本质与含义，研究了科学—技术—工程—产业的知识链，指出技术、工程与经济的关联程度远高于科学与经济的关联程度。文章强调科学与基础研究是资金向知识的转化，而技术创新则是在资本的支持下，使知识通过市场向效益、利润的转化。工程师是新生产力的重要创造者，也是新兴产业的积极开拓者。工程师要面对的是不同层次、不同领域、不同尺度上的技术创新。在经济快速成长时期，应该更加重视工程师的创造性劳动。培养大批工程技术创新人才是推进经济发展、社会进步的必然要求。

The knowledge chain of science-technology-engineering-industry is studied in this paper based on their essences and meanings. It is pointed out that the connection of technology and engineering with economy is much tighter than that of science with economy. It is stressed that science-fundamental research is the transformation of capital to knowledge, and that the technology innovation is the transformation of knowledge to benefit and profit through market by the support of capital. Engineers are the important creators of new productive force and active pioneer of new industrial field. Engineers will confront with technology innovation at different levels, in different areas and on different scales. Much more attention must be paid to the creative work of engineers, especially in rapid economic growth period. The cultivation of a large number of qualified personnel in technology engineering is the requirement for promoting economic development and social progress.