In this study, we proposed the construction of a local museum shared storage according to the increase in public and private museums and the demand for additional museum storage space. We conducted a basic study on volume estimate of general museum shared storage based on 4 main museum and 21 branch museum storage data in Seoul. In order to estimate the volume of the museum shared storage, we took account of the museum storage capacity and property, cover area, rate of increase of museum storage relics. Based on the basic analysis, the occupied area of the complete material and the fragment material calculated, are applied to the materials of Seoul City Museum. The volume estimate was calculated by applying the short-term data amount up to 10 years after the opening and the correction value is added for the museum storage efficiency. Subsequent studies will require work to complement the accuracy of the volume estimation by applying a wider range of cases and time periods.