PROBLEM TO BE SOLVED: To suppress an erroneous determination as if there were sleep time during an activity time zone of a person to be observed.SOLUTION: A sleep state determination system 10 may include an activity meter 2 for measuring an amount of activity of a person to be observed, and an information processing device 1. The information processing device 1 may include a storage part 13 and a processing part 11. The storage part 13 may store schedule information on the person to be observed. The processing part 11 may acquire data of the amount of activity measured by the activity meter 2, and determine a state on the sleep of the person to be observed based on the acquired data of the amount of activity and the schedule information stored in the storage part 13.SELECTED DRAWING: Figure 1
展开▼