  Various paradoxes about the relativity theory have been developed since the
birth of this theory. Each paradox somewhat shows people's query about the
relativity theory, and solving of each paradox demonstrates the correctness of
relativity theory once again. In this paper, four paradoxes about the special
theory of relativity are brought forward: displacement paradox, electromagnetic
transformation paradox, Doppler paradox and magnetic force paradox. We hope
some researchers can reasonably explain these paradoxes, and then knowledge of
the relativity theory will become more abundant.
