1. A fingerprint identification method, comprising: placing a finger on a photoelectronic sensor module; emitting an invisible light beam toward the finger by a first light emitting element and emitting a visible light beam toward the finger by a second light emitting element; reflecting the invisible light beam to the photoelectronic sensor module after the invisible light beam passes through the finger, such that the photoelectronic sensor module receives at least one invisible light intensity signal of the invisible light beam, and reflecting the visible light beam to the photoelectronic sensor module via a surface of the finger, such that the photoelectronic sensor module receives at least one visible light intensity signal of the visible light beam; generating at least one invisible light photocurrent signal based on the invisible light intensity signal by the photoelectronic sensor module, generating at least one visible light photocurrent signal based on the visible light intensity signal by the photoelectronic sensor module, and transmitting the invisible light photocurrent signal and the visible light photocurrent signal respectively to an analog/digital converter module by the photoelectronic sensor module; generating at least one first digital signal based on the invisible light photocurrent signal by the analog/digital converter module, generating at least one second digital signal based on the visible light photocurrent signal by the analog/digital converter module, and transmitting the first digital signal and the second digital signal respectively to a processor module by the analog/digital converter module; and generating a gray-scale fingerprint image based on the first digital signal by the processor module, generating a colored fingerprint image based on the second digital signal by the processor module, and perfoiiiiing identification based on the gray-scale fingerprint image and the colored fingerprint image.