An aspect of the invention provides a circuit generation system that can automatically generate a power control circuit. In the circuit generation system according to the aspect of the invention includes a behavioral synthesis unit that generates synthesis-attached information and RT-level circuit information based on behavioral-level description information in which information on a circuit is described by a program language; and a power control circuit generation unit that generates a power control circuit based on the synthesis-attached information, and connects the generated power control circuit to an RT-level circuit of the RT-level circuit information.