According to Reuters, the professor said: "If we think out of the box, faeces has precious value to make energy and manure. I have put this value into ecological circulation."
Postgraduate student Heo Hui-jin reportedly added: "I had only ever thought that faeces are dirty, but now it is a treasure of great value to me.
"I even talk about faeces during mealtimes to think about buying any book I want."
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The average person is said to produce around 500g of faeces a day.
This can be turned into 50 litres of methane gas, according to Professor Jae-weon.
That amount of energy could reportedly drive a car 0.75 miles.
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People who use the digital coin creating toilet are paid in a made up currency called Ggool.
Ggool means honey in Korean.
Anyone using the eco-friendly toilet gets 10 Ggool a day.
That's said to be enough for coffee, instant noodles or fruit.
Students can also save up their Ggool to buy books.
The average price of a latte in South Korea is around £3, according to Statista.
To spend the digital money, students just have to use a special QR code.
