Košek trained as a typographer. He produced figurative work lacking originality when he was diagnosed with schizophrenia. He then began observing the sky, the clouds, and the flight of birds, which he sketched in notebooks in the form of mysterious, cryptic diagrams. Like a demiurge, he claimed to be able to influence the weather, prevent cyclones, storms, and tsunamis, and even affect the world order:

“I not only controlled the weather but also politics; I appointed Vaclav Havel president of the Republic. […] I believed myself to be immortal.”

Like George Widener, another iconic figure of contemporary outsider art, Zbynek Košek considered himself a prophet of chaos and imbued his works with apotropaic power.

His work has been exhibited in prestigious museums such as the Maison Rouge, the Palais de Tokyo, and MONA (Australia), and is part of the permanent collection of the Centre Pompidou.