PROBLEM TO BE SOLVED: To provide electrostatic agent spraying system and its pre-electrifying system which allows agent gas to be easily attached to an object by providing the object with the polar character opposite to that of the agent gas without decomposing the electrode of the electric discharging part by increasing the charged electricity of the agent gas and minimizing transformation of the agent gas.SOLUTION: The present invention comprises an electric discharging part 5 comprised of a power source 4 which applies a certain pressure between an electric discharging electrode 2 and an opposite electrode 3, an agent evaporating part 6 to gasify the agent, a reactor 8 to mix and band moisture in the air which is electric-charged in the electric discharging part 5 of the upper stream and the agent gas 7 from the agent evaporating part 6 which is in downstream from the electric discharging part 5, and a blowing mechanism 9 to blow air into the reactor 8. The invention includes mixing and banding moisture which is electric-charged by the blowing mechanism 9 in the reactor 8 and the agent gas 7 to make them into a cluster, attaching the electric-charged cluster of moisture and agent gas 7 to an object 11 with the opposite electrode and nonpolar and allowing the function of the agent gas 7 to act on the object.
