Disclosed herein is a solar cell system including: a solar cell; a load controller connected to the solar cell, the load controller being capable of controlling a load applied to the solar cell; an output measuring unit for measuring a power generation output of the solar cell; and an output predicting unit for predicting a value to be reached by the output on a basis of transient response of the output measured by the output measuring unit, wherein the solar cell system has a function of controlling the load controller so as to maximize the value to be reached.