An electronic device comprising: at least one light emitter ; a light receiver ; a digitizer formed at a periphery of the at least one light emitter and the light receiver , the digitizer being configured to detect location information comprising a touch coordinate; and a processor operably connected to the at least one light emitter and the light receiver , wherein the processor is configured to: emit light outside of the electronic device through the at least one light emitter, obtain, through the light receiver , light reflected by an external object among the emitted light, obtain a signal generated based on at least a portion of the reflected light and corresponding to the external object through the digitizer and receive the detected location information from the digitizer , output guide information related to a location of the external object when the signal satisfies a first designated condition, and obtain biometric information about the external object when the signal satisfies a second designated condition, wherein the light receiver comprises a plurality of photodiodes, and the light receiver is configured with at least one of a form in which the photodiodes are integrated, a form in which the photodiodes are disposed parallel to a predetermined direction, or a form in which the photodiodes are disposed at each of an upper portion, left side portion, lower portion, and right side portion based on a central hole of the light receiver . at least one light emitter ; a light receiver ; a digitizer formed at a periphery of the at least one light emitter and the light receiver , the digitizer being configured to detect location information comprising a touch coordinate; and a processor operably connected to the at least one light emitter and the light receiver , wherein the processor is configured to: emit light outside of the electronic device through the at least one light emitter, obtain, through the light receiver , light reflected by an external object among the emitted light, obtain a signal generated based on at least a portion of the reflected light and corresponding to the external object through the digitizer and receive the detected location information from the digitizer , output guide information related to a location of the external object when the signal satisfies a first designated condition, and obtain biometric information about the external object when the signal satisfies a second designated condition, emit light outside of the electronic device through the at least one light emitter, obtain, through the light receiver , light reflected by an external object among the emitted light, obtain a signal generated based on at least a portion of the reflected light and corresponding to the external object through the digitizer and receive the detected location information from the digitizer , output guide information related to a location of the external object when the signal satisfies a first designated condition, and obtain biometric information about the external object when the signal satisfies a second designated condition, wherein the light receiver comprises a plurality of photodiodes, and the light receiver is configured with at least one of a form in which the photodiodes are integrated, a form in which the photodiodes are disposed parallel to a predetermined direction, or a form in which the photodiodes are disposed at each of an upper portion, left side portion, lower portion, and right side portion based on a central hole of the light receiver . <EOS>