A magnetic field communication system for measuring flutter of a turbine blade, comprising: a sensor module adapted to be placed on an outer surface of the turbine blade to sense a signal on the flutter of the turbine blade; an interface converting the signal on the flutter sensed by the sensor module into a magnetic field signal to transmit it to the outside of a casing surrounding the turbine blade; and an adaptor receiving the magnetic field signal and analyzing the magnetic field signal to determine the degree of the flutter of the turbine blade, wherein the adaptor comprises: a magnetic field reception unit receiving the magnetic field signal; a control unit analyzing the magnetic field signal to measure the flutter of the turbine blade; and a power source unit generating a power source using the magnetic field signal and storing the power source, wherein if the amount of the power source charged in the power source unit is equal to or greater than a first amount, the control unit is configured to use the magnetic field signal to measure the flutter of the turbine blade, the first amount being the amount that the charging of the power source unit is completed, wherein, if the amount of the power source charged in the power source unit is equal to or smaller than a second amount, the control unit is configured to use the magnetic field signal to supply it to the power source unit to generate the power source. a sensor module adapted to be placed on an outer surface of the turbine blade to sense a signal on the flutter of the turbine blade; an interface converting the signal on the flutter sensed by the sensor module into a magnetic field signal to transmit it to the outside of a casing surrounding the turbine blade; and an adaptor receiving the magnetic field signal and analyzing the magnetic field signal to determine the degree of the flutter of the turbine blade, wherein the adaptor comprises: a magnetic field reception unit receiving the magnetic field signal; a control unit analyzing the magnetic field signal to measure the flutter of the turbine blade; and a power source unit generating a power source using the magnetic field signal and storing the power source, wherein if the amount of the power source charged in the power source unit is equal to or greater than a first amount, the control unit is configured to use the magnetic field signal to measure the flutter of the turbine blade, the first amount being the amount that the charging of the power source unit is completed, wherein, if the amount of the power source charged in the power source unit is equal to or smaller than a second amount, the control unit is configured to use the magnetic field signal to supply it to the power source unit to generate the power source. a magnetic field reception unit receiving the magnetic field signal; a control unit analyzing the magnetic field signal to measure the flutter of the turbine blade; and a power source unit generating a power source using the magnetic field signal and storing the power source, wherein if the amount of the power source charged in the power source unit is equal to or greater than a first amount, the control unit is configured to use the magnetic field signal to measure the flutter of the turbine blade, the first amount being the amount that the charging of the power source unit is completed, wherein, if the amount of the power source charged in the power source unit is equal to or smaller than a second amount, the control unit is configured to use the magnetic field signal to supply it to the power source unit to generate the power source.