Big Data? What’s that? “Big Data? What’s that?” I captured it when I was chatting with my friends. Then I searched information about Big Data from internet and books. After several days’ exploration, I knew, nowadays, we have mass data used in city management, manufacture and various predictions, which greatly opens my eyes and motivates my curiosity on researching it. Later, I touched R Programming and Getting And Cleaning Data, which are provided by Johns Hopkins University on Coursera. After learning the two courses, I created great interest in playing with the data. Can I find some marvelous correlations from the data sets? Could I use the data to do something? These questions pushed me to transfer to Statistics. (Are there any mistakes? Can we make it simpler?)