Identifier is an important tool for us to distinguish between things and strengthen their management. Based on analyzing the current situation of electronic archives management in China, this paper suggests to improve electronic archives management and utilization by the means of electronic archives identifier（EAI）,and introduces identifier study in relevant fields in an attempt to explore the basic composition and implementation model of EAI. Furthermore, this paper holds the view that, EAI doesn’t negate the importance of archival code, on the contrary, it is the update and improvement of archival code in information era.