This paper presents some examples of the application of thermography in agrophysics on the base of investigations performed by the present authors and known from literature. Application of thermal imaging method enables to determine heat and water conditions of different cultures. It also makes it possible to determine both the approaching or persisting plant water stress and the actual evapo-transpiration from arable areas with high accuracy. The analysis of a temperature map of a crop surfaces enables to select precisely the ranges of negative changes which are not observed by eyes, e.g. plant diseases in the early stage, root system damages etc. Thermography is a good tool of the controlling of thermal conditions in hot-bed cultures and is more and more often used for plant materials quality determination.