Abstract: Provided is a financial service providing method of an electronic apparatus comprising checking whether a financial service is available for a user based on the user's first sales information, checking a condition of use of the financial service for the user based on the user's second sales information, providing information on whether the financial service is available and the condition of use to an external apparatus, providing unsettled sales information of the user based on an information request from the external apparatus, and changing payment account information of a sales price to be paid to the user based on receiving information related to approval of providing the financial service from the external apparatus. Other example embodiments are also possible.