The present invention discloses a coffee bean processing device with a VOC processing system. The coffee bean processing device with the VOC processing system comprises a coffee bean roasting machine.The roasting machine comprises a conical tank and a heating device. One end of the conical tank is connected with a driving device for driving the rotation of the conical tank; the other end of the conical tank is connected with a horizontally placed exhaust pipe; the other end of the exhaust pipe communicates with an air pump through an elbow pipe; an air inlet of the air pump communicates withthe elbow pipe; an air outlet of the air pump communicates with a horizontally placed first air purifying tank; the bottom part of the first air purifying tank communicates with the air pump; the toppart of the first air purifying tank is provided with a first air outlet pipe; an air outlet of the first air outlet pipe communicates with a second air purifying tank; the first air outlet is connected with the bottom part of the second air purifying tank; the second air purifying tank is located above the first air purifying tank; the top part of the second air purifying tank is provided with asecond air outlet pipe; the first air purifying tank is internally filled with water; the second air purifying tank is internally filled with organic solvent; and a valve for controlling conduction ofan exhaust pipe is arranged on the exhaust pipe. The coffee bean processing device achieves an effect of purifying air.