Abstract: Solar tower-gas turbine power system could push forward the commercialization process of solar thermal power due to its lower cost, lower risk of research and development as well its ability to overcome the random and wave character issues. In order to study the heat transfer and power transformation characters of solar tower-gas turbine power system and the influences of parameters on the system performances, component models of the heat transfer and power transformation were developed for the compression chamber, foam ceramics receiver, combustion chamber and gas turbine. The models were simulated by Matlab software to analyze the influences of pressure ratio, porosity, thickness,foam ceramics receiver surface area and inlet air temperature on the systems. The research can provide some references for the design and operation of the system.