Big data is the development of the Internet to the present stage of an appearance or characteristics only, there is no need to myth it or keep in awe of it, in the cloud computing as the representative of the technological innovation of the curtain of the lining, these originally difficult to collect and use the data began to be easy to be utilized through the continuous innovation of all walks of life, big data will gradually create more value for mankind.

Secondly, if you want a systematic cognition of big data, you have to break it down comprehensively and meticulously, and I set out to unfold it from three levels:

The first level is the theory, which is an obligatory way of cognition, and also the baseline that is widely recognized and disseminated. Here we understand the industry's overall portrayal and characterization of big data from the definition of its characteristics; analyze the preciousness of big data from the discussion of its value; gain insight into the development trend of big data; and examine the long-lasting game between people and data from the special and important perspective of big data privacy.

The second level is technology, which is the means to realize the value of big data and the cornerstone to move forward. Here the development of cloud computing, distributed processing technology, storage technology and perception technology respectively are used to illustrate the whole process of big data from collection, processing, storage to the formation of results.

The third level is practice, and practice is the ultimate value of big data. Here from the Internet of big data, government big data, enterprise big data and personal big data, respectively, four aspects to depict the big data has shown a beautiful scene and the blueprint will be realized.