The invention discloses a flame intensity adjustable double-gas-source control system with a power generating device. According to the flame intensity adjustable double-gas-source control system, oneend of a pressure reduction valve is provided with a gas inlet for connecting natural gas or liquefied gas, and a gas outlet is formed in the other end of the speed reduction valve; one end of a control valve is provided with a gas input port connected with the gas outlet of the pressure reduction valve, the other end of the control valve is provided with a first gas supply pipeline connected witha weak flame device, and a second gas supply pipeline connected with the temperature difference power generating device, and further comprises a third gas supply pipeline and a fourth gas supply pipeline which are connected with a main combustor. The control valve adjusts the gas supply amount of the gas supply pipelines and selects the gas supply pipeline of the main combustor under control of acontroller. A flame ion probe is arranged at the position of the weak flame device. The controller is connected with and controls the control valve, the temperature difference power generating deviceand the weak flame device, the controller is connected with the flame ion probe, and the control valve is controlled to select the gas supply pipeline of the main combustor according to the feedbackof the flame ion probe.