An imaging cartridge chip (101, 704), comprising: a communication module for providing data communication between the imaging cartridge chip and an imaging device; a non-volatile data storage module for storing at least two different serial numbers; a control module configured to: when the imaging device requests to read serial number information from the imaging cartridge chip, send a serial number in a selected temporary data storage unit to the imaging device via the communication module; determine whether the serial number sent to the imaging device passes a legitimacy verification of the imaging device; and when the serial number sent to the imaging device does not pass the legitimacy verification of the imaging device, send a second serial number: characterized in that: the imaging cartridge chip also comprises a volatile temporary data storage module connecting between the communication module and the non-volatile data storage module, and including at least two temporary data storage units (103a, 103b, SRAM_A, SRAM_B, SRAM_C); the control module is configured to, based on a preset condition, load different serial numbers into corresponding temporary data storage units; and the second serial number to be sent is read from another temporary data storage unit to the imaging device, the selected temporary data storage unit and the other temporary data storage unit both being contained within the volatile temporary data storage module. a communication module for providing data communication between the imaging cartridge chip and an imaging device; a non-volatile data storage module for storing at least two different serial numbers; a control module configured to: when the imaging device requests to read serial number information from the imaging cartridge chip, send a serial number in a selected temporary data storage unit to the imaging device via the communication module; determine whether the serial number sent to the imaging device passes a legitimacy verification of the imaging device; and when the serial number sent to the imaging device does not pass the legitimacy verification of the imaging device, send a second serial number: characterized in that: the imaging cartridge chip also comprises a volatile temporary data storage module connecting between the communication module and the non-volatile data storage module, and including at least two temporary data storage units (103a, 103b, SRAM_A, SRAM_B, SRAM_C); the control module is configured to, based on a preset condition, load different serial numbers into corresponding temporary data storage units; and the second serial number to be sent is read from another temporary data storage unit to the imaging device, the selected temporary data storage unit and the other temporary data storage unit both being contained within the volatile temporary data storage module. when the imaging device requests to read serial number information from the imaging cartridge chip, send a serial number in a selected temporary data storage unit to the imaging device via the communication module; determine whether the serial number sent to the imaging device passes a legitimacy verification of the imaging device; and when the serial number sent to the imaging device does not pass the legitimacy verification of the imaging device, send a second serial number: characterized in that: the imaging cartridge chip also comprises a volatile temporary data storage module connecting between the communication module and the non-volatile data storage module, and including at least two temporary data storage units (103a, 103b, SRAM_A, SRAM_B, SRAM_C); the control module is configured to, based on a preset condition, load different serial numbers into corresponding temporary data storage units; and the second serial number to be sent is read from another temporary data storage unit to the imaging device, the selected temporary data storage unit and the other temporary data storage unit both being contained within the volatile temporary data storage module. the imaging cartridge chip also comprises a volatile temporary data storage module connecting between the communication module and the non-volatile data storage module, and including at least two temporary data storage units (103a, 103b, SRAM_A, SRAM_B, SRAM_C); the control module is configured to, based on a preset condition, load different serial numbers into corresponding temporary data storage units; and the second serial number to be sent is read from another temporary data storage unit to the imaging device, the selected temporary data storage unit and the other temporary data storage unit both being contained within the volatile temporary data storage module.