Provided is an organism data processing method and device, storage medium and program that is able to predict and control changes in the state of an organism. The level of expression of molecules in an organism is measured over a set time interval； the measured time-series data is divided into a periodic component, an environmental stimulus response component and a baseline component； a constant region of the time-series data is identified from variations in the baseline component or from the amplitude or periodic variations of the periodic component； and causal relationships within the identified constant region are identified. The relationship between the external environment and variations in the internal environment is identified and from the causal relationships within the identified constant region, changes in the state of the organism are inferred. Further, from the relationship between the external environment and variations in the internal environment, inferring disease onset in the organism is possible. The molecules can be molecules in the blood or molecules in a culture medium.
