The western credit card has really become an electronic currency that can replace the traditional cash circulation to a certain extent, which makes the cash flow in western developed countries quite low. In addition, the western credit card is also an advanced payment tool and credit tool. China's credit card is basically a debit card that mainly absorbs customers' deposits; The functions of Chinese and western credit cards are different. Western countries can form a wide variety of credit card products with different functions through the differentiated services provided by card issuers. It not only has the functions of payment and settlement, remittance and transfer, shopping and payment, but also has the credit functions of personal credit, credit consumption, revolving credit and installment payment. In China, however, the functions of credit cards are too single, with many payment functions, and the use of credit functions is extremely limited, and each card system is incompatible with each other; Chinese and western credit cards have different issuers. There are three main types of credit card issuers in the west. One is the retail credit card issued by commercial organizations, which accounts for about 45% of the total credit cards in the world. Second, travel and entertainment cards issued by the service industry, issued by airlines, travel companies, etc., are used to buy train tickets, plane tickets and other accommodation and consumption. Third, credit cards issued by banks, such as shopping cards, charge cards and ATM cards, are widely used. However, the issuers of credit cards in China are all banks or other financial institutions, which limits the scope of use of credit cards and also affects the expansion speed and issuance scale of credit cards. Chinese and western credit cards have different business models. Specialized management is the most important feature of western credit cards, which is reflected in two aspects: one is to separate the credit card business from the bank and become an independent profit variety for independent companies to operate; The second is to achieve large-scale operation through professional outsourcing, thus reducing the operating costs of the entire bank card industry. In China, banks are not only issuers of credit cards, but also business entities. The credit card business is intertwined with other businesses of banks, and the operating cost is high. There is a big difference in profits between Chinese and western credit card industries. The basic profit of western credit card industry includes annual fee, merchant commission, overdraft interest and service charge, among which 6%-7% of the profit comes from overdraft interest of credit card, and the profit contribution of credit card is relatively high. However, the profit structure of China's credit card industry is relatively simple, and the profit source is mainly merchants, with little overdraft interest and basically no service charges; The scale of Chinese and western credit cards is different. Compared with the United States and Japan, China is obviously different in card scale, per capita card quantity and accounts receivable scale. To expand the scale of China's credit cards, we must take the road of specialized operation and large-scale operation.