1. A system for managing electronic data, comprising: an identification data storage part storing identification data identifying specific electronic data stored in data storage; an output part configured to output a visible image corresponding to the specific electronic data, and add to the visible image an identification image based on the identification data identifying the specific electronic data; an identification recognition part configured to detect the identification image in the visible image, and recognize the identification data from the detected identification image; and a data sending part configured to send specified electronic data corresponding to the recognized identification data to a specified destination.