A far infrared heating device and a sauna system using the same are provided. The far infrared heating device includes a stationary housing, a heating unit, a fan, and a control assembly. The stationary housing has an installation space and includes a first side and a second side. The second side is opposite to the first side. The first side and the second side respectively have a first installation vent and a second installation vent. The heating unit is disposed in the installation space and includes a far infrared ceramic element and a positive temperature coefficient element. The far infrared ceramic element and the positive temperature coefficient element are respectively disposed near the first installation vent and the second installation vent. The fan is disposed on the second side. A blow direction of the fan is from the second installation vent to the first installation vent. The control assembly is electrically connected to the positive temperature coefficient element and the fan.一種遠紅外線加熱裝置及應用此遠紅外線加熱裝置之三溫暖系統。遠紅外線加熱裝置包含固定殼體、加熱單元、風扇及控制組件。固定殼體具有裝配空間,且包含第一側及第二側。第二側係相對於第一側,且第一側及第二側分別具有第一裝配口與第二裝配口。加熱單元設於裝配空間中,且加熱單元包含遠紅外線陶瓷元件及正溫度係數電阻元件。遠紅外線陶瓷元件及正溫度係數電阻元件分別係鄰設於第一裝配口與第二裝配口。風扇係固設於第二側,且風扇之出風方向係由第二裝配口吹向第一裝配口。控制組件係電性連接至正溫度係數電阻元件及風扇。100‧‧‧遠紅外線加熱裝置110‧‧‧固定殼體122‧‧‧遠紅外線陶瓷元件124‧‧‧正溫度係數電阻元件130‧‧‧風扇130a‧‧‧出風方向140‧‧‧控制組件
