A vehicular starter battery management system including, in combination, a battery management system which is coupled with a power terminal set and an accumulator unit of the vehicular starter battery to manage the recharging and discharging of the accumulator unit, wherein the battery management system includes a detection unit, a processing unit, a control unit, a discharging circuit and a communication unit, with that the detection unit, the control unit and the communication unit are coupled with the processing unit respectively, whereas the discharging circuit is coupled with the control unit; characterized in that the detection unit includes a static detection circuit and a dynamic detection circuit, the static detection circuit contains a micro current detection circuit, an anti-theft detection circuit and a static voltage detection circuit, wherein a precise value and a minimum detection value of the current intensity that the micro current detection circuit detects are 1mA respectively; that when the battery management system is at a static mode, the micro current detection circuit detects the discharge current intensity of the accumulator unit and the static voltage detection circuit detects the voltage of the accumulator unit; that when the battery management system is at the anti-theft state, the anti-theft detection circuit detects the discharge current intensity of the accumulator unit; that the dynamic detection circuit includes a dynamic voltage detection circuit, a dynamic current detection circuit and a temperature detection circuit, wherein when the battery management system is at a dynamic mode, the dynamic voltage detection circuit detects the voltage of the accumulator unit, the dynamic current detection circuit detects the discharge current intensity of the accumulator unit, and the temperature detection circuit detects the ambient temperature; that the processing unit is a microprocessor which transmits a signal to the control unit and the communication unit respectively to operate the control unit, based upon the current intensity, the voltage, the temperature and the time at which the battery management system enters into the static mode, which are detected by the detection unit; that the control unit includes a static circuit and a dynamic circuit, wherein the static circuit is coupled with the power terminal set and the accumulator unit, allowing the accumulator unit to discharge to the power terminal set through the static circuit which is provided with a circuit switch to control the on/off state of the static circuit; that the dynamic circuit includes a first circuit, a second circuit, a third circuit and a fourth circuit, wherein the first circuit and the second circuit are coupled respectively with the power terminal set and the accumulator unit that an external power recharges the accumulator unit through the first circuit and the accumulator unit discharges to the power terminal set through the second circuit, the third circuit and the fourth circuit are connected parallel and are coupled respectively with the discharging circuit and the accumulator unit that the accumulator unit discharges to the discharging circuit through the third circuit or the fourth circuit, the first circuit, the second circuit, the third circuit and the fourth circuit are provided respectively with a circuit switch, and each circuit switch controls the on/off of the first circuit, the second circuit, the third circuit and the fourth circuit respectively; that the discharging circuit is a power consumption circuit which is used to consume the power of the accumulator unit; and that the communication unit is a Bluetooth transceiver and the processing unit uses the communication unit to transmit a signal to and receives a signal from a hand-held communication device which is equipped with an application, thereby accessing the voltage, the discharge current intensity and the ambient temperature of the accumulator unit from the communication device to operate the battery management system.