The present invention discloses a physiological signal wireless transmission system which is compatible with a magnetic resonance system. The physiological signal wireless transmission system comprises an implantable sensing device, and a power relay device wirelessly connected to the implantable sensing device. The implantable sensing device comprises a sensing module including at least one sensor, a data transmission module coupled to the sensing module, and a power receiving module coupled to the sensing module and the data transmission module. On the other hand, the power relay device comprising a data transmission antenna wirelessly connected to the data transmission module, a first microprocessor connected to the data transmission antenna, a display module connected to the first microprocessor, a power transmitting antenna wirelessly connected to the power receiving module, and a power emitting module coupled to the power transmitting antenna.
