Since the ancient times, the meaning of life is an important topic which has been continuously discussed. Its importance comes from the inquiry into why sentient beings should live, which is a core question of life. As long as there is life, this question will not go away. Concerning about the meaning of life, quite a lot of articles lack strict examination of the concept of “meaning” and what the concept of “meaning” really asks. As a consequence, many discussions mix up the concept of meaning with other concepts such as “value” or “achievement.” In this thesis, through reflecting on the purpose of this very question, we can ascertain what meaning is asking. In order to understand our life and want to know how to guide our future life, the issue of the meaning of life is raised. So the concept of “meaning” is defined as follows: deconstructing things and abstracting the factors, making these factors connected with the world, and consciously adding the elements into future. That is to say, by this cognitive process, meaning shows forth. Through reflecting on the deeds we did and ...