A method for displaying product information for an electronic price tag includes: displaying a piece of first product information of at least one first product in an area where the electronic price tag is located, the first product information comprising at least one of name information and price information of the first product; and receiving a trigger instruction and displaying at least one piece of second product information of a second product, the second product being (i) at least one product each associated with the first product and having a discounted price, or (ii) at least one product each associated with the first product and having a discounted total price incurred when purchased together with the first product, the second product information comprising at least one of name information, price information, and location information of the second product.