Abstract:The purpose of historical building conservation is to conserve its historical information and value through technological and management measures. The correct technological measures can ensure the authenticity and integrity of the historical environment. The conservation and rsetoration of historical buildings in western countries has a relatively complete working system, including pre-research, technology selection and implementation, archive records, etc. The specific technological types can be divided into common technology, traditional craft, new equipment, new materials and so on. This paper attempts to reveal the connotation of the concept of historical building conservation technology structure in Western countries from different angles.