To　master　the　internal　damage　of　ancient　architecture　wood　members,　by　employing　two　nondestructive　testing　methods　including　stress　wave　and　impedance　instrument,　elm　and　cypress　wood　specimen　which　were　different　damage　types　or　different　internal　defect　area　was　tested.　Then　in　this　paper　a　combinatorial　model　to　forecast　internal　defects　of　ancient　architecture　wood　members　were　established　based　on　Shapley　value.　Results　show　that　Stress　wave　can　get　2D　graphics　of　detection　section　quickly,　and　error　rate　is　higher　when　internal　defect　is　smaller.　The　stress　wave　error　decreases　when　internal　defect　is　more　than　a　quarter.　Impedance　instrument　can　accurately　judge　positions　and　damage　types　for　internal　defects　under　single　path.　The　impedance　instrument　test　results　are　more　accurate　when　internal　defect　of　wood　members　is　small,　internal　defects　area　is　proportional　to　impedance　instrument　error　when　increase.　Applying　the　Shapley　value　method,　the　weight　of　stress　wave　and　impedance　instrument　in　the　combination　forecast　model,　was　determined　by　distributing　the　total　combinatorial　error,　then　a　combinatorial　forecast　model　was　establised.　The　results　suggest　that　combinatorial　forecast　error　is　less　than　10,　and　detection　accuracy　is　higher　than　that　of　the　single　test　results.　The　research　can　help　to　detect　method　from　qualitative　to　quantitative　analysis　for　practical　engineering　repair　reinforcement　scheme　and　provide　effective　data　support.　©　2016,　Beijing　University　of　Technology.　All　right　reserved.