The invention relates to a brand influence index construction method and system and a storage medium. The problems that an existing brand influence index construction method is low in efficiency and large in error are solved, enterprise influence and product influence are obtained, an enterprise influence weight and a product influence weight are obtained respectively, and a brand influence indexis calculated according to the enterprise influence, the product influence, the enterprise influence weight and the product influence weight. Aiming at the collected brand data, a machine method is adopted to quantitatively evaluate the designed brand influence index and quantitatively evaluate the brand influence index, so that the accuracy and effectiveness of brand evaluation are greatly improved, the evaluation and quantification work of the existing brand can be better served, the accuracy is high, the error is small, and the practicability is high.