As a new generation of IT technology, Internet of Things (IOT) has been considered to be the third wave of the world’s information industry development following the computer and the Internet, and one of emerging industries of promoting the world economic growth in the future In order to comprehensively and systematically know the IOT, guide and promote the development of IOT industry in practice, deep research on the structure of IOT industrial chain and the key point which influences development of IOT industry is needed to explore the focal point promoting the IOT industry Through analyzing IOT’s structure, this paper finds that China’s IOT industrial chain consists of sensor/chip manufacturers, software providers, IOT platform providers, system integrators providers, application service providers, network providers, operating service providers and users Then, by using Fuzzy Delphi, this paper proposes that users and sensor/chip manufacturers are key points of China’s IOT industry, according to which, relevant policy suggestions are put forward