A memory card, comprising: a storage unit, a control unit, and a memory card interface, wherein the storage unit and the control unit are disposed inside a card body of the memory card, the memory card interface is disposed on a first surface of the card body of the memory card, characterized in that a shape of the memory card is the same as that of a nano subscriber identity module SIM card, and a size of the memory card is the same as that of the nano SIM card; and the memory card interface comprises at least a first metal contact of the memory card, a second metal contact of the memory card, a third metal contact of the memory card, a fourth metal contact of the memory card, a fifth metal contact of the memory card, a sixth metal contact of the memory card, a seventh metal contact of the memory card, and an eighth metal contact of the memory card, wherein: the first metal contact of the memory card is configured to transmit a power supply signal; the second metal contact of the memory card is configured to transmit a first data signal; the third metal contact of the memory card is configured to transmit a control signal; the fourth metal contact of the memory card is configured to transmit a clock signal; the fifth metal contact of the memory card is for grounding; the sixth metal contact of the memory card is configured to transmit a second data signal; the seventh metal contact of the memory card is configured to transmit a third data signal; and the eighth metal contact of the memory card is configured to transmit a fourth data signal; wherein the first metal contact and the seventh metal contact are adjacent to one another and arranged such that the region in which the first metal contact and the seventh metal contact are located corresponds to a region of the nano SIM card in which the power supply contact of the nano SIM card is located; wherein the fifth metal contact and the eighth metal contact are adjacent to one another and arranged such that the region in which the fifth metal contact and the eighth metal contact are located corresponds to a region of the nano SIM card in which the ground contact of the nano SIM card is located. a shape of the memory card is the same as that of a nano subscriber identity module SIM card, and a size of the memory card is the same as that of the nano SIM card; and the memory card interface comprises at least a first metal contact of the memory card, a second metal contact of the memory card, a third metal contact of the memory card, a fourth metal contact of the memory card, a fifth metal contact of the memory card, a sixth metal contact of the memory card, a seventh metal contact of the memory card, and an eighth metal contact of the memory card, wherein: the first metal contact of the memory card is configured to transmit a power supply signal; the second metal contact of the memory card is configured to transmit a first data signal; the third metal contact of the memory card is configured to transmit a control signal; the fourth metal contact of the memory card is configured to transmit a clock signal; the fifth metal contact of the memory card is for grounding; the sixth metal contact of the memory card is configured to transmit a second data signal; the seventh metal contact of the memory card is configured to transmit a third data signal; and the eighth metal contact of the memory card is configured to transmit a fourth data signal; wherein the first metal contact and the seventh metal contact are adjacent to one another and arranged such that the region in which the first metal contact and the seventh metal contact are located corresponds to a region of the nano SIM card in which the power supply contact of the nano SIM card is located; wherein the fifth metal contact and the eighth metal contact are adjacent to one another and arranged such that the region in which the fifth metal contact and the eighth metal contact are located corresponds to a region of the nano SIM card in which the ground contact of the nano SIM card is located. the first metal contact of the memory card is configured to transmit a power supply signal; the second metal contact of the memory card is configured to transmit a first data signal; the third metal contact of the memory card is configured to transmit a control signal; the fourth metal contact of the memory card is configured to transmit a clock signal; the fifth metal contact of the memory card is for grounding; the sixth metal contact of the memory card is configured to transmit a second data signal; the seventh metal contact of the memory card is configured to transmit a third data signal; and the eighth metal contact of the memory card is configured to transmit a fourth data signal; wherein the first metal contact and the seventh metal contact are adjacent to one another and arranged such that the region in which the first metal contact and the seventh metal contact are located corresponds to a region of the nano SIM card in which the power supply contact of the nano SIM card is located; wherein the fifth metal contact and the eighth metal contact are adjacent to one another and arranged such that the region in which the fifth metal contact and the eighth metal contact are located corresponds to a region of the nano SIM card in which the ground contact of the nano SIM card is located.