This paper discusses about the digital preservation – planning, process and approaches. It also deals with the major part process, issues and technologies involved in preservation of digital materials, explains the overview of technological approaches and strategies to digital preservation and challenges,focuses on operational digital preservation systems specifically in information resource centre (IRC).It considers the wide range of digital objects of interest to IRC, including e-journals, technical reports, e-records, project documents, scientific data, etc. The paper also discusses archiving based on format types – text, data, audio, video, etc. Design, methodology, approach. And also find out that the Digital preservation of documents restores it from loss, theft and decay.