Fingerprint recognition system and identification method thereof

A fingerprint recognition system, applicable to determining a real fingerprint, comprising:

• at least one light emitter, emitting at least one patterned emitted light onto at least an object under test in a recognition area;
• at least one light receiver, electrically connected to the light emitter, for receiving at least one patterned reflected light reflected by the object under test, wherein an incident angle existing between the object under test and the patterned emitted light and a plurality of reflection angles existing between the object under test and the patterned reflected light, and the incident angle and the reflection angle being all between 0 degrees and 90 degrees;
• and
• a comparison module, electrically connected to the light emitter and the light receiver, for comparing the at least one patterned emitted light and the at least one patterned reflected light with each other, and generating a comparison information;
• wherein, when the comparison information is in a three-dimensional comparison interval, the comparison module determining that the object under test having a three-dimensional surface;
• otherwise, the comparison module determining that the object under test having a planar surface;
• the three-dimensional comparison interval being used as a reference value for judging whether the surface of the object under test is three-dimensional, and the patterned emitted light being selected from one or a combination of moving, rotating, zooming in, zooming out, flickering, and non-flickering modes.