In recent years, there are amounts of essence land in the city, but the design of the building is not enough for using as time goes by. It lets a lot of spaces be vacant spaces in the city. This study uses quick strategic decision to filter out some cases that is valuable for investment and then we try to use Delphi hierarchy process to filter out the important factor of recycling evaluating. Finally this study tries to give some important conclusion and suggest evaluating the vacant soaces in the city.