Abstract: A near field communication (NFC) electronic device, a login system using the same and a method thereof are disclosed. The NFC electronic device includes a reading module, an embedded controller and a matching module. The reading module receives identification information transmitted from a readable component when the readable component approaches. The embedded controller is connected to the reading module and stores the identification information. The matching module is connected to the embedded controller and performs a matching authentication according to the identification information. If the matching authentication is successful, the matching module searches whether required account confidential information exists in a database according to the identification information. If yes, the matching module selects and transmits the required account confidential information to the embedded controller.