In today's complicated and rapidly ever-changing community, cooperation between various fields of study has become more and more indispensable. Some individuals insists that the correlation among subjects is so wide that no field can develop and acquire success unless bringing in other field of study. Whereas, others argue, any field is independent, and so every field will develop well without other fields. In my viewpoint, the connection between each field is close, and through communication and coordination in most fields of study can give a good result and bring the new strategies and concepts into some old disciplines and also caused the appearance of some new mixed subjects, like telecommunication, geophysics, into this world