Abstract: An embodiment purge and non-purge adsorption type air dryer system includes a first adsorption tower and a second adsorption tower each including an adsorbent therein and configured to dehumidify compressed air flowing into an inside by using the adsorbent or regenerate the adsorbent by using outside air or the dehumidified compressed air, a plurality of pneumatic valves installed in a plurality of air passages connected to the first adsorption tower and the second adsorption tower, the plurality of pneumatic valves being configured to be opened and closed to change a flow path of each of the compressed air and the outside air, a blower configured to introduce the outside air into the first adsorption tower or the second adsorption tower, and a heater disposed at a rear end of the blower and configured to heat the outside air transferred from the blower.