The various research directions of museum storage derived from the saturation state of storage were examined and classified into museum storage, off-site storage, open storage, and shared storage. In order to understand the characteristics of each type of museum, the National Museum of Korea, the National Folk Museum of Paju, and the Yeongnam area of the Gyeongju National Museum were selected as the main examples. The environmental characteristics were classified into five categories and compared. The occupancy area per point of the collection is 0.022㎡ for the National Museum of Korea, 0.016㎡ for the National Folk Museum of Korea in Paju, and 0.009㎡ for the Yeongnam Storage in Gyeongju National Museum. All of them are different figures, indicating that it is difficult to express the collection data as a collective occupied area per point. However, it can be said that it is the key to planning the storage space because the size of the storage and the temperature and humidity environment can be planned according to the occupied area of the collection. Therefore, 0.2㎡ and 0.02㎡ of figures per point, which are currently used to calculate the storage area, are considered not appropriate for storage space planning. Therefore, a follow-up study is needed to suggest guidelines for deriving the occupied area per point of the collection data.