This paper divided private archiving into two types,evidence-based private archiving and memory-based private archiving, and it propose that current situation of private archiving can be summed up as the thriving development of memory-based private archiving, including the personal or family archiving and community archiving, which indicates that the construction of archival resource is moving form“archival power”(nationalization) to“archival right”(socialization) and private archiving is heading to the trends of collectivization, autonomization, resourcelization. All the above can be considered as kind of“Societal Grand Challenge”that requires extraordinary breakthroughs and the engagement of multiple areas of expertise to address.