Abstract: As one of three revolutions of physics in 20th century, quantum mechanics has greatly transformed the world view of classical science in many aspects. Quantum mechanics breaks though the mechanical determinism in classical science, transforming it into nonmechanical determinism; it changes scientific cognitive process from the theory of reductionism to the theory of wholism; it shifts the way of thinking from pursuing simplicity to exploring the complexity; it also establishes the interaction between subject and object in scientific researches.
Key words: quantum mechanics; world view of classical science; nonmechanical determinism; wholism; complexity; interaction between subject and object