The Smart ID Card System, a system wherein an individual can use the ID card for Door Access and Attendance Management. RFID technology has been employed in this system. When the ID card (containing the RFID tag) is found to be valid by the RFID reader, door access is provided. The door access time (In-time and Out-time) is noted in order to provide the attendance. The attendance of the student is updated in the university portal and also a message is generated to parents through GSM technology. This entire system is divided into two main parts – The Hardware and the Software. The Hardware part includes a motor unit (connected to the door); the RFID Tag (ID card); RFID Reader, which is connected to the host computer device using a serial to USB converter cable and a GSM Module. The Software part includes the Interface created using Microsoft Visual Studio, which is connected to the student database present in Microsoft Access.