An electronic device according to various embodiments of the present invention comprises: a sensor module; a first electrode unit connected to a first channel of the sensor module; and a second electrode unit connected to a second channel of the sensor module, and may be configured to: measure, through the sensor module, a first impedance between the first electrode unit and a first portion of a user's body contacting the first electrode unit, and a second impedance between the second electrode unit and a second portion of the user's body contacting the second electrode unit; adjust, through the sensor module, an impedance corresponding to each of the first channel and the second channel on the basis of the first impedance and the second impedance so that a difference between the first impedance and the second impedance is within a specified range; and obtain a biometric signal of the user through the sensor module while the impedance of the first channel and the second channel are adjusted.