To provide a commodity detection method for accurately detecting and registering commodities of high or low profiting speed to contribute to increase of profits of a store or the like by using dynamic commodity profit information in which a new dynamic index of profiting speed for managing the speed of getting profits of the commodities is introduced.

The commodity detection method uses a computer system having an input means 1, an output means 5, a control part 2, a storage part 3 for the dynamic commodity profit information, and a storage part 4 for information on a commodity of high or low profiting speed, and contributes to the increase of the store profit, and the computer system is provided with a dynamic commodity profit information creating means 6 for introducing the new dynamic index of the profiting speed, and a high or low profiting speed commodity information creating means 7 for accurately detecting and registering the commodity of high or low profiting speed through a predetermined processing based on the profiting speed calculated by the dynamic commodity profit information creating means 6.