A communication method for performing communication with outside by connecting a communication apparatus (e.g., a LAN card) to an electronic apparatus such as a printer. The LAN card is connected to a setting apparatus such as a personal computer (step S301). Then setting information for the electronic apparatus is inputted via the setting apparatus into the LAN card and stored there (steps S302 and S303). The LAN card is connected to the electronic apparatus (step S311), and communication is established based on the setting information in the LAN card. In this manner, a communication function can be easily set even in an apparatus with limited input means such as a printer.