Zygmunt Zawirski was one of the greatest member of the Lvov-Warsaw School. The paper presents his life and the list of his main works, the greatest achievements in philosophy of nature, methodology of science and metaphysics. He pointed at the possibility of studying the scientific metaphysics with the use of the axiomatic method. His important work was the philosophical issue of time: The evolution of the notion of time. Zawirski looked for the justification of the scientific research, listing the problem of induction and deduction, development of the scientific theories and relations of science and metaphysics.