The aim of this diploma thesis is to investigate contactless RFID technology and to demonstrate and test the embedded RFID system, on a smart RFID lock case. Smart lock is used to enter the place for which the identification by RFID transponder is necessary. The RFID transponder operates at the 13,56 MHz frequency range. RFID system makes sure to read the RFID transponder, verify its correctness, unlock or lock the door and record the entry into the history. The user can via the graphical user interface access the RFID system data and also set the parameters of the system. The thesis describes the entire process of design and construction.