Abstract: This paper provides an overview of the controversy around relativity theory. The different opinions are classified into three schools: the accept school, the reject school, the develop school. In this paper, the author listed unarguable experimental facts to disapprove the totally accept school and the totally reject school. The author agrees with the develop school, and provides some ideas for developing relativity theory. Professor Shun-Jin Wang at Sichuan University and the author independently established theories for developing general relativity theory as shown in the references.