Electronic device and method for preventing fingerprint theft using external device

An electronic device is provided. The electronic device includes a display, a communication module, a memory, and at least one processor configured to be operatively connected to the display, the communication module, and the memory. The at least one processor may be configured to detect an occurrence of an event for executing a remaining fingerprint theft prevention service. The at least one processor may be configured to receive remaining fingerprint candidate group data corresponding to a fingerprint candidate area. The at least one processor may be configured to determine authentication validity of the fingerprint candidate area. The at least one processor may be configured to transmit a security level obtained by evaluating a security risk of remaining fingerprints remaining on the display. The at least one processor may be configured to output security guidance information on the remaining fingerprints of the display.