A computer account management system includes: an account management subsystem; an information asset management subsystem; an authentication (integrated) subsystem; a service (integrated) subsystem; and an account portal subsystem; wherein the account management subsystem manages information of physical accounts and logical account numbers; wherein the information asset management subsystem manages data information resources generated by network activities of physical account information; wherein the authentication subsystem provides an authentication integrated interface to the physical account numbers; wherein the service subsystem is a customizable interface which is open to internet or local network; wherein the account portal provides interfaces and tools of login, service list management of services subscribed or bought by the account, account information management and information asset management. The computer account management system is not bundled with services, seamlessly integrated with the user information asset and is lifetime-valid. The system can be used in account management of the internet.