با کد زیر مشکل حل شد !

const
Text ='{"data":{"records":[{"stname":"نمايشگاه","StId":1},{"stname":" فلکه پارک","StId":2},{"stname":"تقي آباد","StId":3},{"stname":"طلاب","StId":4} ,{"stname":"نخريسي","StId":5}],"status":true}}';
var
JSONObject, JSONObject2, currcond: TJSONObject;
arrayjson: TJSONArray;
i:integer;
begin
JSONObject := TJSONObject.ParseJSONValue(Text) as TJSONObject;
JSONObject2 := JSONObject.GetValue('data') as TJSONObject;
arrayjson := JSONObject2.GetValue('records') as TJSONArray;
for i :=0 to arrayjson.Count-1 do
begin
currcond := arrayjson.Items[i] as TJSONObject;
showmessage(currcond.GetValue('stname').Value);
end;