In order to improve transmission capacity of radio over fiber system, a photonic generation method of hybrid frequency and phase shift keying (FPSK) signal is proposed. Based on various response characteristics of polarization maintaining fiber Bragg grating (PM-FBG), the baseband signal modulated onto the optical polarization is translated to output wavelength shift. Then frequency beating is implemented at the receiver to achieve frequency modulation. Meanwhile, an optical phase modulator is employed at the transmitter to map the phase information of the optical signal to the generated microwave signal. Finally, a hybrid FPSK signal is generated. The proposed method is experimentally demonstrated through a transmission test in a radio over fiber (RoF) system. A hybrid FPSK signal with 1-Gbit/s bit rate and 12.5-GHz/9.5-GHz frequency is generated and modulated by the receiver after transmitting a 5-km fiber. The results of temporal waveform, the eye-diagram and constellation diagram after demodulation verify the effectiveness of the proposed scheme.