Abstract: The formation pressure can indicate the formation energy in the development of oil field,and the appropriate formation pressure is an important condition for oil field development and adjustment.With the development of oil field,the formation energy will decrease,which might affect the development of oil field greatly.Therefore,it is very important to know the pressure condition quickly and correctly.In this paper,the character of StethoScope tool is introduced,and the pressure flow measuring process and the testing results are analyzed,which is significant for its wide application.