An agricultural chemical use risk management system has been developed. This system has been designed to enable actual business use on farms. The main feature of this system is that it judges the propriety of agricultural chemical use at multiple stages and according to multiple standards. These standards include the Japanese Agricultural Chemicals Regulation Law and an original standard published by an agricultural cooperative association. The propriety is judged at several stages from agricultural chemical registration through to control work before chemicals are applied in the field. The system can automatically register details of the location where judgments are being made and which agricultural chemicals are being used (5W1H) including images of pests through the use of a camera-equipped GPS cellular phone. The system was trialled in an actual business setting in a proof of concept at a Tendo City agricultural cooperative association. This confirmed the effectiveness of the multi standard and multistep judgment method.<br>In related work, a study compared the relative merits of providing a judgment on agricultural propriety before or after recording agricultural chemical use. In an approach using Optical Character Recognition (OCR) agricultural chemical use history was registered first, and its propriety was judged afterwards. In a cellular phone-based approach, the propriety of agricultural chemicals use was judged first, and the agricultural chemical use history was registered afterwards. Although the OCR method is being widely adopted in the present environment, our study suggests that the cellular phone method will increasingly gain favor.