CPU card is a class of smart card, the current application field is still not very wide, so in life CPU card is not common. 

It can be applied to many fields such as finance, insurance, traffic police, government industry, etc. It has the characteristics of large user space, fast reading speed and support for multiple uses of one card, and has passed the certification of the Peoples Bank of China and the National Commercial Secret Commission.

　 Financial smart card: It conforms to the China Financial integrated Circuit (IC card) Specification, has passed the Peoples Bank of Chinas testing, supports multiple uses of one card, supports multiple file types, supports Single DES and Triple DES algorithms recognized by the Peoples Bank of China, and supports the e-purse and e-deposit functions stipulated by the Peoples Bank of China.

　 Social Security card: supports one card for multiple uses, and each application is independent of each other. It conforms to the Social Security (Personal) card Specification and the China Financial integrated Circuit (IC) card Specification, and has passed the testing by the Ministry of Labor and Social Security.

　 E-commerce smart card: It can quickly complete the signature, authentication, encryption and decryption operations of RSA algorithm, generate 1024-bit RSA key pairs in the card, support multiple uses of one card, and each application is independent of each other. It conforms to the China Financial integrated Circuit (IC) card Specification and has passed the security test of the National Commercial Code Administration Committee.　　Terminal Security Control Module: Complies with China Financial integrated Circuit (IC) card Specification for AM cards, including ordinary AM cards and high-speed AM cards.

　 SAM card: Security access module SAM is the core of security control in smart card application system.

　 SIM card: Mobile communication user identification card, in line with GSM11.11, cell phones can not only transmit voice data, but also carry out financial transactions, e-commerce and other applications.

　 Standardization of CPU cards: As the current world economy is developing towards internationalization, globalized financial service systems have been established, which brings a problem of card interoperability. the same card should be able to be used in different countries and in different environments. To solve this problem, only to develop a series of international standards, so that the CPU card and its interface equipment manufacturers in accordance with a unified standard, manufacturing a unified interface specifications of the product, in order to ensure that different countries, different industries are using a unified CPU card software and hardware technical specifications to develop application systems, so as to achieve interchangeability between the CPU card produced by different manufacturers and the sharing of interface equipment.