The utility model discloses a photo-thermal and geothermal combination and complementation renewable energy power station system. The system comprises a geothermal system steam generation device, a solar light condensation and heat collection system steam generation device, a high-pressure cylinder and a low-pressure cylinder system. The geothermal system steam generation device generates saturated steam with pressure, and the saturated steam enters the low-pressure cylinder system to do work. The exhaust steam of the low-pressure cylinder system is condensed to be water, the water enters the solar light condensation and heat collection system steam generation device to form overheat steam, the overheat steam enters the high-pressure cylinder to do work, the exhaust steam of the high-pressure cylinder enters the solar light condensation and heat collection system steam generation device again to be heated again to form reheat steam, the reheat steam enters the low-pressure cylinder system to do work, and the exhaust steam of the low-pressure cylinder system is condensed to be water to perform circulation again. According to the system, geothermal energy low in enthalpy value can be converted into energy high in enthalpy value for utilization, the economy of a unit is improved, meanwhile, continuous operation of the unit can be kept, the defects existing in a single solar photo-thermal power station and a single geothermal power station are avoided, and advantage complementation is achieved.