The invention discloses a 
system that can realize installment 
payment of 
credit card, including the business terminal of the 
credit card, receipting the input business information of installment 
payment, sending the read and received information by finance network to the 
processing device of installment 
payment; the 
processing device of installment payment is to receive the information which is sent by the business terminal of 
credit card through finance network , verifying the installment payment business according to the received information, examining the line of credit, initial payment, liquidation in instalment, installment payment register, line of credit renewal and the operation of installment payment enter an item in an account. This invention discloses a device and method which can realize installment payment of credit card at the same time. By making use of the invention, the installment payment function of credit card has realized, the problem that the interest-free scheduled time of credit card consumption is short and 
overdraft interest is high have been resolved, the returning money pressure of people who holding the card reduced, the consumption using card expanded, it has promoted the fast development of the commodity economy, made a 
bank gain more business amount.