Abstract: The paper discusses the importance of the environment of the apparatus room in digital library and several matters in its construction,such as power supply system, air conditioning system, cleanliness,lightning protection and static electricity protection, environment monitoring system, etc. and gives some advice of the apparatus room construction in digital library.

Key words: Digital Library, Environment of Apparatus Room, Power-supply and Distribution System, Air-conditioning System,Cleanliness, Lightning Protection and Statics-proofing, Environmental Monitoring