The invention discloses a control device and a control method for pneumatic clearing electromagnetic valves of a gas turbine. The control device comprises at least one of a first control device, a second control device and a third first control device, wherein the first control device is used for carrying out pneumatic clearing on a fuel atomization electromagnetic valve in the starting, operating and stopping processes of the gas turbine, the second control device is used for carrying out pneumatic clearing on a blade dust removal electromagnetic valve in the operation process of the gas turbine, and the third control device is used for carrying out pneumatic clearing on a nozzle cleaning electromagnetic valve in the stopping process of the gas turbine. The control device and the control method have the advantages that effective control over the pneumatic clearing electromagnetic valves can be realized in the starting, operating and stopping processes of the gas turbine, the real-time performance is good, and the reliability is high.