从生命的概念和人类存在的意义的角度提出从大自然“适度取需”的观点。通过分析工业设计定义的变化,指出绿色设计、可持续设计、低碳设计和循环经济等思想是科学与人文和谐统一的表现,验证了“适度取需”原则的正确性。 From the perspective of the concept of life and the meaning of the existence of mankind from the nature of “moderate demand” point of view. By analyzing the changes of the definition of industrial design, it is pointed out that the ideas of green design, sustainable design, low carbon design and circular economy are the manifestations of the harmonious unity between science and humanity, which verifies the correctness of the principle of “reasonable demand”.