Detection of latent fingerprints is one of the key problems in the forensic science area, and ultraviolet (UV) photography technology is an important method of latent fingerprints noninvasive detection. The 266 nm UV solid state laser is used as the excitation light source. According to the special absorption, reflection, scattering and fluorescence characteristics of fingerprint ridge residuals to UV light, and by using reflection photography and fluorescence photography technologies, fresh and old latent fingerprints on the surface of four types of non-absorbent objects (magazine cover, glass, back of cellular phone, wood desktop paintwork), and two types of absorbing objects (manila envelope and notebook paper) are noninvasively detected and revealed. The results have identification value.