An electronic device, comprising: a light emitting unit comprising a plurality of first light emitting elements configured to output first light including a first wavelength; a first light receiving unit and a second light receiving unit ; and a processor configured to: control to receive a request for obtaining a biometric signal corresponding to a living body; select, when the request is received, at least one first light emitting element of the plurality of first light emitting elements based on user information related to the living body; control the light emitting unit to output light through the selected at least one first light emitting element; characterized in that the processor is further configured to control the first light receiving unit and the second light receiving unit to receive at least some of light reflected by the living body among the output light; detect a first biometric signal based on the light received by the first light receiving unit; detect a second biometric signal based on the light received by the second light receiving unit; compare the first biometric signal and the second biometric signal to determine whether noise has occurred; and determine the biometric signal based on whether the determined noise has occurred. a light emitting unit comprising a plurality of first light emitting elements configured to output first light including a first wavelength; a first light receiving unit and a second light receiving unit ; and a processor configured to: control to receive a request for obtaining a biometric signal corresponding to a living body; select, when the request is received, at least one first light emitting element of the plurality of first light emitting elements based on user information related to the living body; control the light emitting unit to output light through the selected at least one first light emitting element; characterized in that the processor is further configured to control the first light receiving unit and the second light receiving unit to receive at least some of light reflected by the living body among the output light; detect a first biometric signal based on the light received by the first light receiving unit; detect a second biometric signal based on the light received by the second light receiving unit; compare the first biometric signal and the second biometric signal to determine whether noise has occurred; and determine the biometric signal based on whether the determined noise has occurred. control to receive a request for obtaining a biometric signal corresponding to a living body; select, when the request is received, at least one first light emitting element of the plurality of first light emitting elements based on user information related to the living body; control the light emitting unit to output light through the selected at least one first light emitting element; characterized in that the processor is further configured to control the first light receiving unit and the second light receiving unit to receive at least some of light reflected by the living body among the output light; detect a first biometric signal based on the light received by the first light receiving unit; detect a second biometric signal based on the light received by the second light receiving unit; compare the first biometric signal and the second biometric signal to determine whether noise has occurred; and determine the biometric signal based on whether the determined noise has occurred. <EOS>