The dissertation takes the interaction relationship of the "diachrony" and "simultaneity" of the development procedure and internal & external environment of Hsinchu historic architecture conservation as the core of the discussion. It probes from three aspects of legislation, system and execution to understand the formation and development of historic architecture conservation in 70’s and 80’s in Taiwan, which includes development process of historic architecture conservation consciousness promotion from national and local government and observation of the influence from civil participation upon Hsinchu historic architecture conservation at the same time. It also selects representative cases and has a close insight of the public and private departments or the expectation and practice from different units of the public departments.