the topic of the industrial internet was first proposed by ge in 2012. this topic and the industry 4.0 proposed by germany in 2013 can be said to have stirred the nerves of many companies. but these new ideas are not groundless. they are the strong technological accumulation of industrialized countries in the past few decades, as well as new strategies, new technological layouts and a new vision for the future after combining with the internet. this article summarizes the nine core technologies of the industrial internet.