There are a multitude of spa houses of all levels and prices. Some are within walking distance from the station, others require transporation such as bus or taxi.
We happened to choose a simple, older spa house where we could rent a private resting room (like a simple hotel) with bath for a few hours. We just fill up with tub with the spa water.
Bus: Take the 216, 218, 223, 266, or 269 to New Peitou.
MRT: Take the MRT Tamsui Line to New Peitou Station
Car: Drive along Chengteh Road to Chungyang Road, then turn into Kuangming Road and continue to New Peitou.
After you get off the MRT then you have to through the Peitou Park .The Hot spring of museum was there.