A terminal device, comprising an NFC chip, and further comprising at least two NFC antennas and at least two secure transaction units, each NFC antenna corresponding to a secure transaction unit. The at least two NFC antennas are respectively located at different positions on the terminal device. The at least two secure transaction units separately comprises a host system or a secure element; or the at least two secure transaction units separately comprises secure elements in at least two SIM cards; or the at least two secure transaction units separately comprises a host system or a secure element in a common domain or a secure domain. The terminal device stores a transaction routing relation table used for storing a correspondence relation between IDs of NFC antennas and card emulation transaction routing destinations. The present invention also provides a transaction routing identification method and system implemented using the terminal device. The present invention can automatically identify the transaction routing of NFC.