Many countries of the world have developed Deposit Insurance Corporations, Lender of Last Resort System, and Regulatory System to strengthen the Finance stability. Nowadays, China has built up Lender of Last Resort System and China Banking Regulatory Commission to supervise its banking. But, Deposit Insurance Corporation is still under discussion. Why it takes China so many years to take Deposit Insurance System? In the following text, I will try to discuss the advantage and disadvantage of Deposit Insurance System and the reason why China didn't take Deposit Insurance System until now.