A system for measuring insulation resistance, configured to measure a positive electrode insulation resistance and a negative electrode insulation resistance connected to both terminals of a battery pack respectively, the system comprising: a first resistance unit which is connected with the positive electrode insulation resistance in parallel, wherein the first resistance unit includes a first measurement resistance and a first scale resistance, which is connected with the first measurement resistance in series; a positive electrode capacitor connected to the positive electrode insulation resistance in parallel; a first switch unit configured to apply current to the positive electrode insulation resistance and the first resistance unit or interrupt the positive electrode insulation resistance and the first resistance unit; a second resistance unit which is connected with the negative electrode insulation resistance in parallel, wherein the second resistance unit includes a second measurement resistance and a second scale resistance which is connected with the second measurement resistance in series; a negative electrode capacitor connected to the negative electrode insulation resistance in parallel; a voltage source connected between the second measurement resistance and a ground; a voltage measurement unit configured to measure the voltage applied between the first measurement resistance and the ground and output the measured voltage as a first voltage, wherein the voltage measurement unit is further configured to measure the voltage applied between the second measurement resistance and the ground and output the measured voltage as a second voltage; a second switch unit configured to apply the current to the negative electrode insulation resistance and the second resistance unit or interrupt the negative electrode insulation resistance and the second resistance unit; a determination unit configured to determine whether first voltage converges and whether second voltage converges,, wherein the first voltage converges when the change value of the first voltage is equal to or less than a predetermined change value and the second voltage converges when the change value of the second voltage is equal to or less than the predetermined change value; a control unit configured to control the first and second switch units in response to whether the first voltage and the second voltage converge, respectively; and a calculation unit configured to calculate a resistance value of each of the positive electrode insulation resistance and the negative electrode insulation resistance by using convergence values of the first voltage and the second voltage. a first resistance unit which is connected with the positive electrode insulation resistance in parallel, wherein the first resistance unit includes a first measurement resistance and a first scale resistance, which is connected with the first measurement resistance in series; a positive electrode capacitor connected to the positive electrode insulation resistance in parallel; a first switch unit configured to apply current to the positive electrode insulation resistance and the first resistance unit or interrupt the positive electrode insulation resistance and the first resistance unit; a second resistance unit which is connected with the negative electrode insulation resistance in parallel, wherein the second resistance unit includes a second measurement resistance and a second scale resistance which is connected with the second measurement resistance in series; a negative electrode capacitor connected to the negative electrode insulation resistance in parallel; a voltage source connected between the second measurement resistance and a ground; a voltage measurement unit configured to measure the voltage applied between the first measurement resistance and the ground and output the measured voltage as a first voltage, wherein the voltage measurement unit is further configured to measure the voltage applied between the second measurement resistance and the ground and output the measured voltage as a second voltage; a second switch unit configured to apply the current to the negative electrode insulation resistance and the second resistance unit or interrupt the negative electrode insulation resistance and the second resistance unit; a determination unit configured to determine whether first voltage converges and whether second voltage converges,, wherein the first voltage converges when the change value of the first voltage is equal to or less than a predetermined change value and the second voltage converges when the change value of the second voltage is equal to or less than the predetermined change value; a control unit configured to control the first and second switch units in response to whether the first voltage and the second voltage converge, respectively; and a calculation unit configured to calculate a resistance value of each of the positive electrode insulation resistance and the negative electrode insulation resistance by using convergence values of the first voltage and the second voltage.