At this point, it is anticipated that the storage space will reach saturation in the near future. A significant number ofinstitutions are seeking to secure storage space from a mid-to-long-term perspective and find various methods under thesepredictions. As part of this, various concepts and perspectives of off-site and shared storage are being discussed. However, forsome institutions, it is difficult to independently prepare off-site storage, suggesting the need for the establishment of regionalshared storage as a new alternative for the increasing amount of relics. In order to construct shared storage, it is judged thatthe basis for the scale plan, which considers the number of relics, the amount of increase, genre classification, and storagecharacteristics based on the data collected in various regions and the attributes of relics, needs to be discussed. Despite theexistence of various storage scale planning methodologies at this point, the size of the building is calculated based on thequantity of relic scores. Four national institutions generally have 0.0072-0.0428㎡/object, and the more commonly used area perused collection of relics is 0.2㎡/object. It has been pointed out that this does not reflect the differences caused by the diversityof size, material, and attributes of museum materials, and the range of errors is excessive. From this perspective, this studybegan with the inference that differences in the properties of museum materials by genre would be more effective as anindicator of scale theory. The purpose of this study was to investigate and analyze two public museums in Seoul, verify thevalidity of this study, and present implications for the final plan for the scale of shared storage.