**Abstract**

In this chapter, we focus on the integrated nature of STEM education in a wide-ranging view. Frist, we briefly interpret reasons why STEM education and synthesize various standpoints of integration in the literature. Then, on the basis of the relevant literature on integrated STEM education, an ideal model is proposed, which include four elements: discipline knowledge, teaching strategies, expectations, and learning system. After that, some analysis and discussion of this ideal model together with all parts of the model are provided. Followed by this ideal model, we have examined the literature on integrated STEM education in action so as to discuss the way to be integrated toward STEM education and enactment of integrated STEM education in practice. Finally, based on this ideal model, a couple of conclusions are summarized and implications are discussed.

**Keywords:** integrated STEM education, ideal model, K-12 education, curriculum integration, context
