Currently, museums and galleries in our country have been aware of the necessity of constructing the on-line systems to prepare for the digital age in each area and have been studying arduous labors. However, they are not equipped with proper platform which could embrace the on-line system yet, even lacking the contents which could settle problems. Therefore, the present research aimed at analyzing the cases of the on-line museum/gallery platform of national museums/galleries and suggesting the implications out of the platform construction and the improvement plans, acting up for the digital age, in order to prepare for natural disasters. As we enter into the digital age, the on-line museum/gallery platform style is on the rise as a form of gallery in the future because of the change of the communication methods. Accordingly, it is thought that it is needful to construct the structure and system in advance in order to have on-line museum/gallery platform perform within. Plus, it is necessary to provide them with legal regulations on the on-line museum/gallery platform in oder to make them recognize the legitimacy for the operating standards, support system, etc. on the national level and get protection.