A method of synchronizing a users biosignal data received from a plurality of measurement devices is provided, including: transmitting a time set command to each of the plurality of measurement devices receiving the users first biosignal data from each of the plurality of measurement devices, the first biosignal data including a time axis and the time axis including a measurement start time and a measurement termination time comparing the measurement start time and the measurement termination time with a standard time and generating second biosignal data from corrected first biosignal data, corrected by referring to the standard time, when the comparison results in an error and synchronizing a plurality of the second biosignal data and generating third biosignal data, wherein each of the plurality of measurement devices receives the time set command and generates the first biosignal data.
