An innovative quality control system for grain and feed, that is in development, includes measurement hardware and software. The hardware consists of autonomous sensors capable of constant measurement of relative humidity, grain and fodder temperature and CO2 gas concentration. These parameters are the main indicator of mold and / or pest metabolism processes, and their analysis in time allows for early detection of a grain or fodder spoilage when a further spoilage process can be controlled. Depending on the size of the warehouse and the results of the research carried out during the project, up to a dozen of such independent sensor devices will be installed in the warehouses. Sensors capture parameters and wirelessly transfer them to the processing server, which will evaluate data and detect spawn places of mold and/or pests. After setting the tolerance of the indicators, the farmer will receive an informative notice on the established fact and place of the spawn place by electronic means. The farmer will be able to analyze detailed information and historical data on a dedicated web portal that can be accessed by his computer or mobile device. It is estimated that this solution will reduce loss caused by grain or fodder spoilage during storage by 5%, and when the changes occur, the farmer will be able to take timely preventive action and reduce grain losses. Using such technology an average farmer would save up to € 3,500 per year by preserving the crop during storage, avoiding its forced utilization, the farmer will be able to take environmentally friendly measures at the lowest cost in the timely manner: to ventilate, cool, ozonate the grain without suffering more financial losses and applying rational use of the machinery.