A digital technological method for cultural relics, calligraphy and original products, wherein the method uses electromagnetic waves in a wavelength range of 750 nm-100 Mm to irradiate a physical entity and extract three-dimensional externally and internally reflected waves that represent features of electromagnetic structures of atomic and molecular clusters, which are converted into a specific identification digital code by means of analog-to-digital conversion. The identification digital code may be used for commodity trading to eliminate counterfeit goods, and may be used for identifying, locating, speed measurement, early warning, collection protection, resource evaluation, disaster prevention and mitigation, and the national security of the physical entity, regardless of whether it is day or night and regardless of the weather.
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