The present invention relates to a pest control apparatus and, more particularly, to a smart pest control apparatus allowing wireless control and variable adjustment of dispersion amount, which is compact in size so as to be used for multiple purposes and which allows the dispersion amount to be varied by the wireless control. The pest control apparatus of the present invention, which can be mounted on or removed from a vehicle cargo box or an agricultural trailer and discharges a pesticide solution onto agricultural crops, roadside trees, and forests, includes: a pesticide solution tank, which stores the pesticide solution, is formed from an anti-corrosive material, and has a stirring device and a residual quantity indication device attached thereto a spray pump, which takes in the pesticide solution in the pesticide solution tank so as to highly pressurize the pesticide solution wherein the power of the spray pump is regulated by an electronic clutch a pesticide solution ejection device, which turns the pesticide solution pressurized by the spray pump into fine particles for spraying a manual ejection device, which allows the pesticide solution pressurized by the spray pump to be ejected manually a dispersion device, which scatters the fine particles of the pesticide solution sprayed by the pesticide solution ejection device to a greater distance a lifting and lowering device, which can freely adjust the angles of the pesticide solution ejection device and the dispersion device by a specific amount a pivoting device, which allows the pesticide solution ejection device and the dispersion device to pivot in a left-right direction a power device, on which a gasoline engine or a diesel engine is mounted as a power source for driving the spray pump and a hydraulic pump a freezing prevention device, which prevents the spray nozzle section of the pesticide solution ejection device from being frozen in the winter a residual water discharge device, which prevents freezing
