A system for verifying an external device control function of a secondary battery management device, that includes an input/output terminal unit, a communication terminal unit, a measurement terminal unit and a gauging processor, the system comprising: a computer including an input/output interface, and configured to execute a verification program; and an interface unit configured to convert an external device control signal being output from the input/output terminal unit and a transmitting communication message including operation state information of the external device being output through the communication terminal unit into a data format that may be transmitted through the input/output interface and transmit said external device control signal and said transmitting communication message to the verification program through the input/output interface, and to convert a virtual response signal including the operation state information of the external device being output through the input/output interface from the verification program and a receiving communication message demanding the operation state information of the external device into a data format that may be transmitted through the input/output terminal unit and the communication terminal unit, ind then output said virtual response signal and said receiving communication message through the input/output terminal unit and the communication terminal unit wherein the verification program is configured to generate the receiving communication message and output the same through the input/output interface, and when the converted external device control signal is received through the input/output interface, output the virtual response signal through the input/output interface, and when the transmitting communication message is received through the input/output interface, compare the operation state information of the external device included in the virtual response signal with the operation state information of the external device included in the transmitting communication message, and determine a verification result regarding the external device control function of the secondary battery management device according to whether the operation state informations are identical and display the same on a monitor of the computer. a computer including an input/output interface, and configured to execute a verification program; and an interface unit configured to convert an external device control signal being output from the input/output terminal unit and a transmitting communication message including operation state information of the external device being output through the communication terminal unit into a data format that may be transmitted through the input/output interface and transmit said external device control signal and said transmitting communication message to the verification program through the input/output interface, and to convert a virtual response signal including the operation state information of the external device being output through the input/output interface from the verification program and a receiving communication message demanding the operation state information of the external device into a data format that may be transmitted through the input/output terminal unit and the communication terminal unit, ind then output said virtual response signal and said receiving communication message through the input/output terminal unit and the communication terminal unit wherein the verification program is configured to generate the receiving communication message and output the same through the input/output interface, and when the converted external device control signal is received through the input/output interface, output the virtual response signal through the input/output interface, and when the transmitting communication message is received through the input/output interface, compare the operation state information of the external device included in the virtual response signal with the operation state information of the external device included in the transmitting communication message, and determine a verification result regarding the external device control function of the secondary battery management device according to whether the operation state informations are identical and display the same on a monitor of the computer.