The present technology relates to an information processing device capable of obtaining an index effective for a measurement target as an index related to light incident on the measurement target, an information processing method, and a program.The information processing device can obtain an index effective for a measurement target as an index regarding light incident on the measurement target by calculating an effective index representing the degree of light effectively utilized for the measurement target in incident light as an index regarding the light incident on the measurement target, on the basis of a measured value regarding the measurement target which is obtained by sensing performed by a sensor. The present technology can be applied to, for example, an apparatus calculating an index of plants.
