The disclosure is related to a blowing apparatus with expandable functions, an expansion device, and an operating method. The blowing apparatus has an electrical interface used to connect one of the expansion devices with various functions. The blowing apparatus has a control unit used to identify an operating mode of the expansion device connected with the blowing apparatus. A control signal is therefore generated. According to the control signal, the control unit controls rotating speed of a fan unit and a heating temperature of a heating unit. The expansion device can be disposed with a mist unit having a container and a mist generating unit. The mist unit sprays the mist to an outlet cap of the expansion device. The blowing apparatus then blows the mist out of the outlet cap by means of the rotating speed of fan unit and the temperature of heating unit.
