PROBLEM TO BE SOLVED: To provide a liquid refining device and a sauna device using the same which can omit a piping work for discharging unrefined liquid, thereby facilitating construction work.SOLUTION: The present invention includes: a heat exchanger 7 and a fan motor 8 which are provided in an air channel between an air inlet 4 and an air outlet 5 a liquid refining means 9 provided between the fan motor 8 and the air outlet 5 and a control means 28 for controlling the liquid refining means, the heat exchanger 7, and the fan motor 8. A rotating means 13 of the liquid refining means 9 includes a rotational axis 19 and an inverse conical column pipe 22 formed in an axis direction of the rotational axis 19 integrally with a plurality of rotational plates 20a, 20b which are rotatable about the rotational axis 19. The control means controls supplying of water to the rotating means 13 and driving of the rotating means 13, the heat exchanger 7 and the fan motor 8, and detects a water level at a first thermister 26, a second thermister 27, and a third thermister 33 to open and close the water feed valve 17 and control water feed by detecting an error thereof.
