The present invention for a test apparatus for measuring the water quantity is forced circulation by the liver of the vehicle engine and radiator to the water pump, in particular is connected to the water pump as a pulley and a belt, a shaft rotated in which the belt is wound around the pulley that is to detect the number of de-installation taekteo drive motor and; One to each end is connected to the chulsugu ipsugu of the engine is inserted inside the opening force of the thermostat and radiator hoses and the water meter; A knob for adjusting the power of the driving motor being formed on the test result by the engine speed and the water meter consists of a quantity a controller for to indicate by the display detected by the exact cooling water quantity measurement test sensed by the de taekteo so that will shorten the time required for the test at the same time, the number of tests and measurements nopyige reliability that work performance is greatly improved, in particular, to secure the effect of being able to measure the test.