On the one hand, some humanity believes that all collegians should learn any field they have a tendency, on the other hand, some people think they should only consider the job opportunities in the future. In other words, the first group feels that liking a major is the most influential factor in selecting a major, although another group is against this thesis; believes the most noteworthy thing that should be taken into account is the subject be helpful in the future. I feel without a savour; nobody can get a pleasant result in his major according to the reasons I will mention in the following.