Abstract: Cloud computing is widely used in the Internet and carrier fields. However, the centralized setting of service processing capabilities is not sufficient for applications with high mobility and low latency. The emergence of fog computing, extending the processing power of cloud computing to the edge of the network, is a distributed cloud computing. Through the introduction of the concept of fog calculation and the introduction of cloud computing and edge computing, this paper introduces the technical architecture, system architecture and software architecture of fog computing in the application process, and describes the situation of fog computing in the application of IoT by examples. Future fog computing plays a supporting role in the application of the Internet of Things。

Key words: cloud computing, fog computing, Internet ofThings