A portable complex sensor device for measuring a plurality of pieces of biometric information, wherein the plurality of pieces of biometric information comprises electrocardiogram information and blood information, the portable complex sensor device comprising: a plurality of biometric information measurement circuit units (230 and 260) configured to measure the plurality of pieces of biometric information; a plurality of input terminal sets (210 and 240) configured to allow each of the plurality of biometric information measurement circuit units (230 and 260) to receive an input signal; a plurality of current sensors (220 and 250) configured such that, when a subject having biometric information is electrically connected to one of the plurality of input terminal sets (210 and 240), a current flows in the subject having biometric information through the electrically connected input terminal set, configured to generate an output signal when sensing the current, and supplied with power at all times; an AD converter connected to an output terminal of each of the biometric information measurement circuit units (230 and 260) and configured to convert an analog signal into a digital signal; a wireless communication device configured to transmit or receive data to or from a smartphone; and a microcontroller connected to the plurality of current sensors (220 and 250) and configured to receive an output of the AD converter, wherein the microcontroller is configured to be supplied with power of a battery embedded in the portable complex sensor device, when the portable complex sensor device is not in use for biometric information measurement, the microcontroller is configured to operate in a sleep mode and the plurality of biometric information measurement circuit units (230 and 260), the AD converter, and the wireless communication device are powered off, the microcontroller is configured to operate in an active mode when receiving the output signal of the current sensor, and controls one of the plurality of biometric information measurement circuit units corresponding to the current sensor, the AD converter, and the wireless communication device to be powered on, the portable complex sensor device is configured to display measured biometric information data on a screen of the smartphone, and the portable complex sensor device comprises a plurality of electrocardiogram electrodes (172 and 174) and a blood test strip insertion hole at a case of the portable complex sensor device, wherein the microcontroller is configured to be activated by the plurality of current sensors (220 and 250) and configured to enter into a sleep mode when a predetermined measurement time has passed or measurement data is transmitted. a plurality of biometric information measurement circuit units (230 and 260) configured to measure the plurality of pieces of biometric information; a plurality of input terminal sets (210 and 240) configured to allow each of the plurality of biometric information measurement circuit units (230 and 260) to receive an input signal; a plurality of current sensors (220 and 250) configured such that, when a subject having biometric information is electrically connected to one of the plurality of input terminal sets (210 and 240), a current flows in the subject having biometric information through the electrically connected input terminal set, configured to generate an output signal when sensing the current, and supplied with power at all times; an AD converter connected to an output terminal of each of the biometric information measurement circuit units (230 and 260) and configured to convert an analog signal into a digital signal; a wireless communication device configured to transmit or receive data to or from a smartphone; and a microcontroller connected to the plurality of current sensors (220 and 250) and configured to receive an output of the AD converter, wherein the microcontroller is configured to be supplied with power of a battery embedded in the portable complex sensor device, when the portable complex sensor device is not in use for biometric information measurement, the microcontroller is configured to operate in a sleep mode and the plurality of biometric information measurement circuit units (230 and 260), the AD converter, and the wireless communication device are powered off, the microcontroller is configured to operate in an active mode when receiving the output signal of the current sensor, and controls one of the plurality of biometric information measurement circuit units corresponding to the current sensor, the AD converter, and the wireless communication device to be powered on, the portable complex sensor device is configured to display measured biometric information data on a screen of the smartphone, and the portable complex sensor device comprises a plurality of electrocardiogram electrodes (172 and 174) and a blood test strip insertion hole at a case of the portable complex sensor device, wherein the microcontroller is configured to be activated by the plurality of current sensors (220 and 250) and configured to enter into a sleep mode when a predetermined measurement time has passed or measurement data is transmitted.