The present invention has an object to provide a medical drug verification device, a medical drug verification method, and a medical drug verification system that can improve robustness in matching information on medical drugs. A medical drug verification device according to a first aspect of the present invention includes an exterior information acquiring unit configured to acquire exterior information on a medical drug, a matching unit configured to perform matching between matching target information based on the acquired exterior information and a reference information group of medical drugs stored in a storage device, a display control configured to cause a display device to display, based on the degree of the matching, a plurality of candidates of reference information for a medical drug which is contained in the reference information group and corresponds to the exterior information, an accepting configured to accept selection of the reference information contained in the plurality of candidates, and a reflecting configured to reflect the exterior information and/or the matching target information corresponding to the selected reference information in the stored reference information group, wherein the reflecting unit performs the reflection when the degree of the matching for the selected reference information does not satisfy a predetermined criterion.
