The utility model relates to a detection apparatus for electrostatic atomization liquid drop electric charge amount, including liquid storage pot, water pump, nozzle, a pair of high voltage electrode, imaging system, the computer that is parallel arrangement, the nozzle is linked together with water pump and liquid storage pot in proper order, the nozzle mouth is located between a pair of high voltage electrode, imaging system is located one side of high voltage electrode to be connected with the computer, liquid drop response lotus under the high voltage electrostatic field effect that high voltage electrode formed that the nozzle produced, imaging system feels the electric liquid drop of record response lotus and leaves the curvilinear motion orbit behind the nozzle to with the picture and video transmission to the computer of this curvilinear motion orbit, the computer calculation goes out the electric charge amount of the electric liquid drop of response lotus. The utility model discloses a non -contact measurement mode responds to the movement track who carries on one's shoulder or back electric liquid drop through the high speed camera record, does not change liquid state of charge, utilizes equation of motion and mechanics equation to calculate and reachs liquid drop electric charge amount, can obtain accurate on line measurement result, simple structure, convenient operation.