This project is called Automated Cashier System via RFID technology. The Radio Frequency Identification Method (RFID) system is used in developing automated cashier system to automatically calculate amount of the total payment of products in mini market environment and displaying the total number of item that customer want to buy. This project aims to achieve connection between RFID reader with product paying system in order to simplify the product paying procedure and ultimately, increase the efficiency of product paying process The system consists of Door Gate, RFID system that consists of 1 unit of RFID reader and 3 unit of RFID antenna.