A capacitive switch device comprising: a touch sensing unit including a sensing electrode and a transmission electrode, which are disposed on a substrate; and a touch control module disposed on a substrate, and configured to confirm a manipulator's contact manipulation state based on a sensing signal from the touch sensing unit and output a touch output signal, wherein the transmission electrode is configured to output a transmission signal in response to a transmission control signal from the touch control module by forming an electrical field at the sensing electrode, and the sensing electrode is configured to detect a signal in response to a sensing control signal from the touch control module for application to the touch control module, wherein the touch control module is configured to activate the sensing electrode and the transmission electrode according to a preset mode; wherein the touch control module comprises a touch sensor control unit configured to apply the transmission control signal to the transmission electrode and the sensing control signal to the sensing electrode, and control the activation of the transmission electrode and the sensing electrode; a signal processing unit configured to process a signal detected by the sensing electrode; a signal output unit configured to output the signal processed by the signal processing unit to the outside; and a storage unit 30 configured to store preset data including an initial value; characterized in that the signal processing unit is configured to: confirm whether or not the touch sensing unit is in an idle state, IDLE=ON, and allow the sensing electrode of the touch sensing unit to confirm a delta capacitance value as a difference between an actual capacitance value and a reference capacitance value from the sensing signal; compare the delta capacitance value with a preset attenuation amount included in the preset data stored in the storage unit to determine whether or not there is a human body touch in the idle state of the touch sensing unit; and if the signal processing unit determines that the delta capacitance value is a negative number that is smaller than the preset attenuation amount, determine a human body touch, HT, state in which the manipulator's body is touched with the touch sensing unit to be ON. a touch sensing unit including a sensing electrode and a transmission electrode, which are disposed on a substrate; and a touch control module disposed on a substrate, and configured to confirm a manipulator's contact manipulation state based on a sensing signal from the touch sensing unit and output a touch output signal, wherein the transmission electrode is configured to output a transmission signal in response to a transmission control signal from the touch control module by forming an electrical field at the sensing electrode, and the sensing electrode is configured to detect a signal in response to a sensing control signal from the touch control module for application to the touch control module, wherein the touch control module is configured to activate the sensing electrode and the transmission electrode according to a preset mode; wherein the touch control module comprises a touch sensor control unit configured to apply the transmission control signal to the transmission electrode and the sensing control signal to the sensing electrode, and control the activation of the transmission electrode and the sensing electrode; a signal processing unit configured to process a signal detected by the sensing electrode; a signal output unit configured to output the signal processed by the signal processing unit to the outside; and a storage unit 30 configured to store preset data including an initial value; characterized in that the signal processing unit is configured to: confirm whether or not the touch sensing unit is in an idle state, IDLE=ON, and allow the sensing electrode of the touch sensing unit to confirm a delta capacitance value as a difference between an actual capacitance value and a reference capacitance value from the sensing signal; compare the delta capacitance value with a preset attenuation amount included in the preset data stored in the storage unit to determine whether or not there is a human body touch in the idle state of the touch sensing unit; and if the signal processing unit determines that the delta capacitance value is a negative number that is smaller than the preset attenuation amount, determine a human body touch, HT, state in which the manipulator's body is touched with the touch sensing unit to be ON. confirm whether or not the touch sensing unit is in an idle state, IDLE=ON, and allow the sensing electrode of the touch sensing unit to confirm a delta capacitance value as a difference between an actual capacitance value and a reference capacitance value from the sensing signal; compare the delta capacitance value with a preset attenuation amount included in the preset data stored in the storage unit to determine whether or not there is a human body touch in the idle state of the touch sensing unit; and if the signal processing unit determines that the delta capacitance value is a negative number that is smaller than the preset attenuation amount, determine a human body touch, HT, state in which the manipulator's body is touched with the touch sensing unit to be ON.