Generally speaking, cloud computing is a kind of network resource, and obtaining the required service content from the cloud on demand is cloud computing. Cloud computing refers to the delivery and use mode of IT infrastructure, and it refers to obtaining the required resources (hardware, platform, software) in an on-demand and scalable way through the network. A network that provides resources is called a "cloud". The resources in the "cloud" can be infinitely expanded by users, and can be obtained at any time, used on demand, expanded at any time, and paid according to use. This feature is often referred to as using IT infrastructure such as water and electricity. Cloud computing in a broad sense refers to the delivery and use of services, and refers to obtaining the required services in an on-demand and extensible way through the network. This service can be related to IT, software and Internet, or any other service.

2. Internet of Things

Simple understanding: the internet connected with things, that is, the Internet of Things. Internet of Things, also known as sensor network internationally, is another wave of information industry after computer, Internet and mobile communication network. As long as the micro sensor chip is embedded and made intelligent, everything in the world, from watches and keys to cars and buildings, can "speak automatically". With the help of wireless network technology, people can "talk" with objects and objects can "communicate" with each other. This is the Internet of Things. With the development of information technology, the application map of the Internet of Things industry is growing. Such as: intelligent transportation, environmental protection, government work, public safety, safe home, intelligent fire protection, industrial monitoring, elderly care, personal health, flower planting, water system monitoring, food traceability and so on. The greatest ideal is a smart earth. At present, smart cities that exist in real life and are under construction are all concepts of Internet of Things hype.

3. Big data

Big data refers to the aggregation of real data with many kinds, large traffic, large capacity, high value and fast processing and analysis speed. Big data, or massive data or massive data resources, refers to information that involves such a large amount of data that it cannot be captured, managed, processed and sorted in a reasonable time by current mainstream software tools to help enterprises make more active business decisions.

4V characteristics of big data: quantity, speed, change and accuracy.

Namely: quantity, diversity, speed and authenticity.

4. Relationship among Big Data, Cloud Computing, Internet of Things and Mobile Internet

The Internet of Things corresponds to the sensory and motor nervous system of the Internet. Cloud computing is the collection of the core hardware layer and the core software layer of the Internet, and it is also the sprout of the central nervous system of the Internet. Big data represents the information layer (data ocean) of the Internet, and it is the basis for the generation of Internet wisdom and consciousness. Including the Internet of Things, the traditional Internet and the mobile Internet, they are constantly collecting and receiving data from the big data layer of the Internet. Cloud computing and the Internet of Things have promoted the development of big data.