To estimate the radical scavenging activity in various agricultural products, the rapid and reliable method is developed. There have been many methods to measure the radical scavenge activities so that it's been difficult to compare the data between different methods. In this study, because the method uses 96-well-plate, it can be carried out by a very small quantity, half-automated. And the radical scavenge activity is estimated by two methods based on different principle, so that the data can be reliable. In this study, about 200 agricultural products were measured. As a result we can gain the data library that is helpful for not only researchers but also farmers and consumers.