The utility model discloses an adopt sour titration cell of thermometric titration method survey transformer oil, include: temperature sensor, magnetic stirring device, reaction tank and reaction tank top cap, temperature sensor sets up inside the reaction tank, and the reaction tank setting is on the magnetic stirring device, and the reaction tank top cap sets up at the reaction tank top, the reaction tank top cap can lift up and descend through elevating system, it is fixed that temperature sensor passes through the reaction tank top cap. The utility model discloses beneficial effect: being applicable to and adopting thermometric titration method survey transformer oil sour, the measuring speed is fast, and the precision is high, simultaneously can operate coloured solution, colloid solution or thick liquid have reduced people's wink feel error that the indicator method brought, have enlarged sample test's range of application.