A method for transmitting a parameter of a storage chip of an imaging cartridge, comprising: receiving an instruction transmitted by a print imaging device; and determining that the instruction is an instruction for reading a key parameter, and transmitting the key parameter to the print imaging device, wherein the key parameter is generated by the storage chip, and wherein the key parameter is fixed information comprising a serial number of the imaging cartridge; wherein a process of generating the key parameter by the storage chip comprises: performing a calculation in accordance with a preset rule based on prestored reference data and a calculation instruction transmitted by the print imaging device to generate a calculation result; and generating the key parameter from the calculation result, wherein the instruction further comprises the calculation instruction; performing a calculation in accordance with a preset rule based on a calculation instruction transmitted by the print imaging device, to generate a calculation result; and generating the key parameter from the calculation result, wherein the instruction further comprises the calculation instruction; or performing a calculation in accordance with a preset rule based on prestored reference data, to generate a calculation result; and generating the key parameter from the calculation result; wherein the performing the calculation in accordance with the preset rule to generate the calculation result comprises: performing the calculation in accordance with a plurality of different preset rules, to generate a plurality of calculation results corresponding to the plurality of different preset rules, and transmitting one of the plurality of calculation results to the print imaging device every time one instruction for reading the key parameter is transmitted by the print imaging device, until the print imaging device stops to transmit the instruction for reading the key parameter; wherein the plurality of calculation results constitutes a plurality of key parameters, generated in accordance with the plurality of different preset rules, which are suitable for different models of print imaging devices respectively. receiving an instruction transmitted by a print imaging device; and determining that the instruction is an instruction for reading a key parameter, and transmitting the key parameter to the print imaging device, wherein the key parameter is generated by the storage chip, and wherein the key parameter is fixed information comprising a serial number of the imaging cartridge; wherein a process of generating the key parameter by the storage chip comprises: performing a calculation in accordance with a preset rule based on prestored reference data and a calculation instruction transmitted by the print imaging device to generate a calculation result; and generating the key parameter from the calculation result, wherein the instruction further comprises the calculation instruction; performing a calculation in accordance with a preset rule based on a calculation instruction transmitted by the print imaging device, to generate a calculation result; and generating the key parameter from the calculation result, wherein the instruction further comprises the calculation instruction; or performing a calculation in accordance with a preset rule based on prestored reference data, to generate a calculation result; and generating the key parameter from the calculation result; performing a calculation in accordance with a preset rule based on prestored reference data and a calculation instruction transmitted by the print imaging device to generate a calculation result; and generating the key parameter from the calculation result, wherein the instruction further comprises the calculation instruction; performing a calculation in accordance with a preset rule based on a calculation instruction transmitted by the print imaging device, to generate a calculation result; and generating the key parameter from the calculation result, wherein the instruction further comprises the calculation instruction; or performing a calculation in accordance with a preset rule based on prestored reference data, to generate a calculation result; and generating the key parameter from the calculation result; wherein the performing the calculation in accordance with the preset rule to generate the calculation result comprises: performing the calculation in accordance with a plurality of different preset rules, to generate a plurality of calculation results corresponding to the plurality of different preset rules, and transmitting one of the plurality of calculation results to the print imaging device every time one instruction for reading the key parameter is transmitted by the print imaging device, until the print imaging device stops to transmit the instruction for reading the key parameter; wherein the plurality of calculation results constitutes a plurality of key parameters, generated in accordance with the plurality of different preset rules, which are suitable for different models of print imaging devices respectively.