Provided is a sensor data analysis system, comprising terminals, a control unit, an analysis unit, and a storage unit, wherein the terminals worn on persons belonging to an organization, the terminals each comprising a sensor to measure a physical quantity, the storage unit holds an activity index of the organization, and holds, for a first condition relating to a behavior of each of the persons, advice corresponding to a statistical relation between an amount of the behavior satisfying the first condition and the activity index, the control unit generates a behavior index for indicating a behavior of a first person based on the physical quantity, the analysis unit calculates, for the first condition, the statistical relation between the amount of the behavior satisfying the first condition and the activity index based on the behavior index, and the control unit outputs advice corresponding to the statistical relation satisfying a second condition.