Capital construction archives, referred to as capital construction archives, are formed in the planning, design, construction, use and maintenance activities of various buildings, structures, underground pipelines and other capital construction projects. That is, all kinds of historical records such as words, charts, audio-visual images and electronic records formed in the whole process of a construction project from brewing, decision-making to completion and put into use should be filed.

Engineering archives refer to the documents and materials of different carriers, such as plans, charts, audio-visual images, which should be filed in urban planning, construction and management activities.