Abstract: SaaS (Software as a Service) has been becoming the very popular software mode;the tenants can get the SaaS service from the Internet,and rent the needed service through the SaaS service provider.This paper proposes the Digital Archives Management Architecture based on the SaaS through combining the supporting multi-tenant,service customization and the requirement of the Digital Archives.The Architecture has the peculiarity that supports the visit from various tenants and is easy to be customized,in favor of giving solution to the archives management logic,and prohibiting redundant costs in various cities.This paper also study the storage model supporting the multi-tenants,and the archives customization model to promote the construction of digital archives.