The Radio Frequency Identification Method (RFID) system is used in developing an inspection system to inspect the assembly product by defining the correct amount and right components that have been assembled. The system consists of the RFID system driven by PC, conveyor and external devices such as indicator lamp, press button and buzzer that driven by a programmable logic controller (PLC). The RFID system will read the data of tags that have been attached to the parts of product whn the product passes through the RFID reader. The data will be read by the Visual Basic interfacing software on PC. The product is considered accepted if the data is matching with the standard data while the product will be considered reject if there are unequal numbers of parts or wrong component is being assembled. Performance analysis of the read range of the reader and the relationship between selected materials of parts is conducted to estimate the effectiveness of integration of RFID into the inspection system.