While science and technology are the first productive forces,engineering is direct productive force,so engineering innovation becomes the main battlefield for innovation.We can describe the process of engineering innovation as the one in which there are a lot of barriers and traps.Since engineering activity consists of technological factors and non-technological factors,engineering has to be researched and treated on the basis of all engineering factors and all engineering stages.Engineering should not be regarded as simply application of science and technology,and engineering knowledge should not be regarded as derivative knowledge from scientific knowledge.While the primary character of scientific and technological activity is repeatability,the primary character of engineering activity is uniqueness.Therefore,the norm of evaluation of scientific and technological activity is origination and the norm of evaluation of engineering is adaptation to that very place and that very time.