Abstract: A card reading device having both contact and contactless card reading functions includes a communication interface for transmitting and receiving signals, an antenna for electromagnetically inducing a contactless card, a protocol processor for exchanging data with the contactless card through the antenna according to a predetermined communication protocol, a card slot for embedding a contact card, an identification module for identifying the contact card, and a microcontroller for processing data stored in the contactless card induced by the antenna through the protocol processor, and exchanging data with a backend device through the communication interface when a result of the identification module represents that the contact card conforms to a predetermined authentication.