A conveyor belt specification determination method, comprising: categorizing, into a plurality of categories (C1,..., C5), a severity of use conditions of a conveyor belt, using a horizontal energy and a vertical energy, which are calculated from the use conditions of the conveyor belt, as indices, the horizontal energy and vertical energy being received by the conveyor belt as a result of objects to be conveyed being fed onto and loaded on an upper cover rubber of the conveyor belt and conveyed; creating a database in which a permissible range of each of prescribed characteristics is set for each of the categories (C1,..., C5), the prescribed characteristics including at least wear resistance and cut resistance of the upper cover rubber, and inputting and storing the database in a computation device; setting a representative rubber physical property of the upper cover rubber that affects each of the prescribed characteristics; ascertaining a degree of influence of the representative rubber physical property that is set on the prescribed characteristics; when determining a specification of the conveyor belt, identifying the category (C1,..., C5) of severity from the use conditions of the conveyor belt on the basis of the database, wherein the horizontal energy and the vertical energy are input into the computation device, and from the input horizontal energy, the input vertical energy and the stored database, the computation device identifies the category (C1,..., C5); identifying an appropriate range of the representative rubber physical property for which the prescribed characteristics are in the permissible range in the category (C1,..., C5) that is identified; and selecting a rubber type, for which the representative rubber physical property is in the appropriate range that is identified, as the upper cover rubber. categorizing, into a plurality of categories (C1,..., C5), a severity of use conditions of a conveyor belt, using a horizontal energy and a vertical energy, which are calculated from the use conditions of the conveyor belt, as indices, the horizontal energy and vertical energy being received by the conveyor belt as a result of objects to be conveyed being fed onto and loaded on an upper cover rubber of the conveyor belt and conveyed; creating a database in which a permissible range of each of prescribed characteristics is set for each of the categories (C1,..., C5), the prescribed characteristics including at least wear resistance and cut resistance of the upper cover rubber, and inputting and storing the database in a computation device; setting a representative rubber physical property of the upper cover rubber that affects each of the prescribed characteristics; ascertaining a degree of influence of the representative rubber physical property that is set on the prescribed characteristics; when determining a specification of the conveyor belt, identifying the category (C1,..., C5) of severity from the use conditions of the conveyor belt on the basis of the database, wherein the horizontal energy and the vertical energy are input into the computation device, and from the input horizontal energy, the input vertical energy and the stored database, the computation device identifies the category (C1,..., C5); identifying an appropriate range of the representative rubber physical property for which the prescribed characteristics are in the permissible range in the category (C1,..., C5) that is identified; and selecting a rubber type, for which the representative rubber physical property is in the appropriate range that is identified, as the upper cover rubber.