This study was to reveal consumer attitudes about open shelf-life dating method of the packaged foods. Consumers consider that open shelf-life dating to the packaged foods gives good information to choose the products to buy, but also confusion with unclear open shelf-life dating marked on the package. For the perishable foods, consumers tended to get more attention to the open shelf-life dates. Consumers prefer the dating method of edible periods better than sellable periods to the packaged foods. The female consumers consider that open shelf-life dating is more important to buy the packaged foods than male consumers do.