Cold brew coffee extraction device

A cold brew coffee extraction device comprising:

• a container including a first chamber configured to receive cold water, wherein the first chamber includes a first opening, and wherein a first cover is provided to seal the first opening;
• a filtering cup mounted in the first chamber, wherein the filtering cup includes a second chamber intercommunicating with the first chamber, wherein the second chamber is configured to receive coffee powders, wherein the second chamber includes a second opening, wherein the filtering cup further includes a third opening at a lower end thereof, and wherein a filter is disposed in the third opening;
• and
• an extraction operation device including a first guiding tube, a pump, and a controller, wherein the first guiding tube includes a first end intercommunicating with the second chamber and a second end located outside of the container, wherein the pump is disposed outside of the container and is connected to the second end of the first guiding tube, and wherein the controller is electrically connected to the pump to control operation of the pump to thereby supply air into or suck air out of the first guiding tube, thereby controlling a water level of the cold water in the first chamber.