PROBLEM TO BE SOLVED: To predict a drying time regardless of conditions such as a material and a thickness of laundry. A data storage unit 303 for storing reference value information used for washing and drying prediction including a reference change amount threshold M, a reference time interval N, a reference drying first half time X, and a reference drying second half time Y is provided, and the degree of drying is provided. When time-series data of the dryness degree value for the laundry to be predicted to be dried is obtained from the value sensor, the drying completion detection means 81 for detecting the drying completion based on whether the current dryness degree value is equal to or higher than the drying completion threshold, and the drying completion detecting means 81. With respect to the degree of dryness curve, the change point passing time chg indicating the time from the start of washing of the laundry to be predicted to dry to the change point by detecting the change point at the time when the reference change amount threshold M or more is reached. The drying prediction time calculation means 83 for calculating the drying prediction time by using the change point passing time detecting means 82, the detection result by the drying completion detecting means 81, and the detection result by the changing point passing time detecting means 82. Equipped with. [Selection diagram] Fig. 3
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