The engineering ideas, which reflect value pursuits of engineering practitioners, are overall, principled, programmatic requirements for engineering. From the function aspect, the engineering ideas are the fundamental guiding ideology as well as essential principles for engineering practices. Based on the predecessors' achievements, this paper presents that the core ideas of modern engineering can be summarized to have following attributes: people-oriented, resource saving, and environmental friendly. Furthermore, the relevant explanations and demonstrations to each point are incorporated.