Climate change has severe impacts on the historic and cultural heritage around the world.This paper evaluated the harmfulness and influence of climate factors on the cultural heritage long time exposed to the outside environment in Tainan.It provided a reference basis for sustainable maintenance by the relative climatic risk levels of cultural heritage.Meanwhile，the energy consumption has increased，and the thermal comfort became worsen in recent years due to the high temperature phenomenon of urban heat island.This study explored the microclimate countermeasures of the coastal area of Tainan City by utilizing the summer sea breeze.Various simulations were carried out to analyze and discuss the influence of spatial planning and design strategy on microclimate environment.The main strategies included the adjustment of the floor area ratio，the setback restriction of buildings and the public space preservation.The strategies of Tainan's urban renewal plans were to strengthen the waterfront urban structure on both sides of the canal.The Blue-Green Belt Renewal Project，an important spatial redevelopment plan for urban public interests，is aimed to revive urban vitality and improve the surrounding living environment.