Earthquake　has　serious　destructive　and　catastrophic　impact　on　people＇s　life.　The　most　important　thing　after　earthquake　is　to　rescue　and　evacuate　people　to　a　safe　place　as　soon　as　possible.　Time　means　return　of　life　in　emergency　rescue　after　earthquake.　The　critical　question　is　how　to　choose　shelters　to　ensure　that　overall　evacuation　time　is　the　shortest.　In　order　to　make　the　most　of　a　suitable　evacuation　plan,　eight　assessment　indexes　are　proposed　to　quantitatively　evaluate　level　of　service　of　Earthquake　Emergency　Shelter　(EES)　using　Analytic　Hierarchy　Process　(AHP).　Then　a　model　for　EES　choice　based　on　constrained　optimization　theory　is　provided.　Its　objective　is　to　ensure　that　the　total　evacuation　time　is　the　shortest.　At　the　same　time　the　model　comprehensively　considers　the　choice　of　evacuation　route.　©　2011　ASCE.