The long-term preservation of electronic records （archives） relates to works in various stage of production, transfer and storage of electronic records. Hence both cooperation and responsibilities sharing among multiple related duty persons is needed. Among them, the establishment of responsibility system for long-term preservation of electronic records, clearly defining responsibility subject and implementation responsibility content of subject is one of the mechanism that ensures long-term preservation. This article studies the responsibility system from the aspect of life cycle of electronic records, analyzes the target and characteristics of electronic records in different stage of life cycle, and also factors influencing long-term preservation and the solutions. Based on the analysis, the article divides responsibility subject of different stages, defines responsibility content and suggestes an responsibility system for long-term preservation of the electronic records （archives）.