Disclosed herein is an automatic product price payment counter including an input device, an output device, and a control device. The input device inputs information about one or more products to be purchased by detecting a barcode attached thereon. The output device displays the information about the products and performs steps of paying for the price of the products. The control device performs comparison and determination on the information input from the input device with information stored in product information DataBase (DB). The input device includes a weight measurement unit including a first balance and a second balance configured to measure the weight of the products, and a cash slot and a card slot. The output device includes a cash change slot configured to refund change after the price of the products has been paid in cash.