diff --git a/samples/Lua/TestLua/Resources/luaScript/AccelerometerTest/AccelerometerTest.lua b/samples/Lua/TestLua/Resources/luaScript/AccelerometerTest/AccelerometerTest.lua
index 89739511f4..0aa26faf6c 100644
--- a/samples/Lua/TestLua/Resources/luaScript/AccelerometerTest/AccelerometerTest.lua
+++ b/samples/Lua/TestLua/Resources/luaScript/AccelerometerTest/AccelerometerTest.lua
@@ -23,30 +23,33 @@ local function AccelerometerMainLayer()
         return
       end
 
+      local director = cc.Director:getInstance()
       local szBall  = ball:getContentSize()
       local ptNowX,ptNowY = ball:getPosition()
+      local ptTemp = director:convertToUI(cc.p(ptNowX,ptNowY)) 
 
-      ptNowX  = ptNowX - x 
-      ptNowY  = ptNowY - y 
+      ptTemp.x  = ptTemp.x + x * 9.81 
+      ptTemp.y  = ptTemp.y - y * 9.81
 
+      local ptNext = director:convertToGL(cc.p(ptTemp.x,ptTemp.y))
 
       local minX  = math.floor(VisibleRect:left().x + szBall.width / 2.0)
       local maxX  = math.floor(VisibleRect:right().x - szBall.width / 2.0)
-      if ptNowX <   minX then
-        ptNowX = minX
-      elseif ptNowX > maxX then
-        ptNowX = maxX
+      if ptNext.x <   minX then
+        ptNext.x = minX
+      elseif ptNext.x > maxX then
+        ptNext.x = maxX
       end
       
       local minY  = math.floor(VisibleRect:bottom().y + szBall.height / 2.0)
       local maxY  = math.floor(VisibleRect:top().y   - szBall.height / 2.0)
-      if ptNowY <   minY then
-        ptNowY = minY
-      elseif ptNowY > maxY then
-        ptNowY = maxY
+      if ptNext.y <   minY then
+        ptNext.y = minY
+      elseif ptNext.y > maxY then
+        ptNext.y = maxY
       end
       
-      ball:setPosition(cc.p(ptNowX, ptNowY ))
+      ball:setPosition(cc.p(ptNext.x , ptNext.y))
     end
     
     layer:registerScriptAccelerateHandler(didAccelerate)