The present invention provides information providing system including: a wireless sheet attached to an article; and an information notifying apparatus which notifies information on the article in response to a radio signal sent from the wireless sheet, wherein, the wireless sheet includes a wireless measuring unit which, when receiving a radio signal, generates and sends a radio signal having identification data and data of physical quantity measured in the wireless sheet, and the information notifying apparatus includes: a transmitter/receiver which exchanges radio signals with the wireless sheet; a storage unit which stores the identification data and the article information in association with each other; and a notifying unit which extracts from the received radio signal, the identification data and the physical quantity data, and reads the article information stored in association with the identification data in the storage unit, and notifies the article information and the physical quantity data.