A radio-over-fiber (RoF) system based on self-homodyned 60 GHz receiver is proposed and theoretically demonstrated. It overcomes the phase noise induced by incoherent lasers and avoids using wide bandwidth electro-optic devices and phase-locked loops. It not only supports the transmission of high bit-rate signals, but also simplifies the central station and the remote antenna unit. The usage of baseband signals or intermediate frequency (IF) signals in the uplink and downlink improves the spectral utilization rate. The downlink uses the high-speed photo-detector to generate photonic 60 GHz millimeter wave, and the terminal uses self-homodyned receiver to remove the impact of phase noise and obtains baseband signal directly. The uplink uses the low-speed photo-detector to generate baseband signal directly, to decrease the price of the central station, and to reduce the number of optical sources. Using OptiSystem and Matlab simulation, it can be concluded that when the bit error rate (BER) of the uplink and downlink equals 10-9, the sensitivities of light can be improved by 7.1 dB and 1.5 dB, respectively. The proposed system realizes a 2.5 Gb/s baseband signal transmitting over a 32.4 km single mode fiber (SMF) link without error.