PROBLEM TO BE SOLVED: To provide a pleasant sleep support device capable of achieving pleasant sleep support according to each user.;SOLUTION: A pleasant sleep support device 100 comprises: a first acquisition part 110 for acquiring first indoor environment information; a determination part 120 for (i) determining a control content of equipment 500 which performs indoor environment control for pleasant sleep support according to a control content determination rule, or (ii) determining a control content of the equipment 500 in a random manner; an output part 130 for outputting the control content; a second acquisition part 140 for acquiring comfort information indicating comfort for a user in indoor; and an update part 150 for updating the control content determination rule based on the first indoor environment information and the comfort information, in which the determination part 120 selects the determination of (ii) at a probability ε.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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