AbstractIn this paper we discuss the relationship between data and DIKW, that the data only evolves to knowledge, which may have some value, but if without the wisdom we still could let the knowledge be really useful to people. Now the big data occupies much attention in some extent for his volume, velocity, and variety. But in practical use the value plays more important role. Finally to judge the value for data not necessary for big, in some cases the small data also may lead to big value. So we appreciate the data science, which may consider more inherent value from data.