Abstract. Radio frequency identification devices (RFID) and business cards emerge as technology develops and it becomes hard to manage them or find a needed one from a piles. A smart bracelet aiming at providing an effective way to manage these cards is proposed in this paper, consisting of a near field communication (NFC) module for data exchanging, a microcontroller for controlling and configuring system, a Bluetooth Low Energy (BLE) module for communication with smartphones and indication module for give user quick feedback. An application on smart phones is built to interact with users and help configure the bracelet. There are three functions of this smart bracelet: 1. Reading cards content; 2. Simulating cards; 3. Exchanging virtual business cards. This smart bracelet is able to simulate MIFARE cards. And it can read content of card and display it on the smartphone. Besides, it also support exchanging personal information via shaking hands if both wear a smart bracelet.) Experiments are conducted to test functional integrity, performance and power consumption. The test result indicates this smart bracelet works and have a 5 days battery life, work distance of 2 cm and 1 second waiting time on operation.