The invention relates to a self-authentication information anti-fake product and a method thereof. The product comprises: an information carrier is provided with at least two regions; one is a characteristic information region; and the other is a self-authentication information region. The method comprises the following steps that: a substrate is arranged on the information carrier; the substrate material contains unique characteristic information; the characteristic information is converted into another information expression mode, namely self-authentication information which is expressed on a certain carrier material; when identification is needed, an image acquisition instrument is used to identify and read the characteristic information of the substrate on the information carrier; a relevant instrument is used to read the self-authentication information recorded on a anti-fake product; the information is subjected to internal conversion according to a rule; whether two kinds of information are corresponding is judged in a manual or automatic mode; if the two kinds of information are corresponding, the product is real; and if two kinds of information are not corresponding, the product is fake. The product and the method have the advantages that: the product can be conveniently and accurately identified, so that a fake producer cannot effectively copy the products; the product has low cost, can be produced in large batch and is suitable for various fields.