In this study, a prototype RF-ID reader system working at 125 KHz frequency was designed and succesfully implemented. Fundemantals of designing a reader systems has also been addressed. For the Radio Frequency interface, EM4095 (Marine Electronics product) has been choosen. In the software side, the reader MCU was programmed using C Programming Language. It is believed that this study will give a systematic approach to design an RF-ID technology based reader device.