Abstract: The task of philosophy is not only to explain the world,but also to change the world.Practice is the foundation and link to change the world.However,human practice is always an open,dynamic,and perfecting process toward future,therefore,philosophy has double functions on practice:that of service and criticism.For quite a long time,in the application process of theory into practice,the service function of philosophy is emphasized,while the criticism function is weakened.Under the circumstance that human survival environment is threatened by global problems,we need to absorb the lessons and experience to emphasize the function of philosophy to surpass,innovate,and predict in practice,and further push forward the synchronous development and mutual compensation to seek the sustainable road for human kind.

Key words: practical evaluation, practical criticism, practical surpass