[Problem] To provide a system which can prevent harm to surroundings due to the pesticide drift. [Solution] This GAP-conforming pesticide spraying system 1 is provided with a pesticide sprayer 10 and a computer 30. A control unit 32 of the computer 30 executes an area acquisition module 322 and acquires the area of an agricultural field to be sprayed with pesticide. Further, the control unit 32 executes a guideline information extraction module 325 and, on the basis of the pesticide determined for spraying, extracts guideline information in line with guidelines on the common base of good agricultural practices (GAP). Further, the control unit 32 executes a wind information acquisition module 328 and acquires the wind direction and wind speed of wind blowing in the aforementioned area. Further, the control unit 14 of the pesticide sprayer 10 executes a control module 141 and controls operation of the pesticide sprayer 10 on the basis of the guideline information, the wind direction and the wind speed such that
