“Mona Lisa” was valued at 3.45 billion US dollars in 1920, and now its conservative valuation has exceeded 10 billion. But I feel that something is wrong, because even if we spends tens of billions, it is impossible to reproduce the “Mona Lisa”. Therefore, money as the estimate of artistic , which is neither precise nor objective, because the value of the art not about external factor, the value of art is what it inside, the time period it stand for, the unique social background or the vision for the future, those artwork are more strong than the  word. We can feel through doth artwork, that’s the valve of the art.