Bookof Laughter and Forgetting is one of the best novels ever written by Milan Kundera. It tells the story of different life experiences of different characters with Prague as the connecting line. It also reflects that crazy, fallen and barbarous age, thus causing the readers to think about the philosophy of life. Memory and forgetting, angels and demons are the double themes existing in the novel. They are intertwined with each other so as to promote the development of the plot. The complete interpretation of variations of these two themes not only helps us in the understanding of the philosophical content of the work, but also leads us to recognizing the universality and timelessness of contradictions. As a result, we should learn to raise an aloof attitude when facing contradictions in life.