"Synesthesia Machine" is an artificial intelligence with synesthesia, it will emit corresponding unique scents while perceiving human facial expressions. Through the facial expression recognition algorithm, it can analyze the facial expressions of the audience and output the values of different emotions. At the same time, based on these emotional values, the installation is driven to extract different proportions of scent liquid and atomize and mix to convert the audience's facial expression into a unique smell. In this work, I try to give artificial intelligence the ability to feel, which is also a response to this year's theme "The Digital Awakening": with the development of digital technology, can artificial intelligence also perceive the emotions of humans and make its own response?