The invention relates to an electric control system of a comprehensive pile driver drill pipe and an electric control method thereof. The system and the method solve the problem that the automation degree of an existing pile driver is low. The system comprises a drill pipe assembly, a power head and a drill pile disassembly and assembly device, and the drill pipe assembly is provided with multiple drill pipe bodies. The drill pipe disassembly and assembly device is provided with a disassembly and assembly driver. The power head is connected with a drill pipe lifting mechanism provided with a plurality of lifting drivers. The power head, the disassembly and assembly driver and the lifting drivers are connected with a power source, and a first power adjusting device is disposed between the power source and the power head. A second power adjusting device is arranged between the power source and the lifting drivers. The drill pipe assembly is connected with an ash conveying system, an ash conveying control device is arranged between the drill pipe assembly and the ash conveying system, and the disassembly and assembly driver, the first power adjusting device, the second power adjusting device and the ash conveying control device are all connected with a PLC. The electric control system has the advantages that rotation and lifting speed of a drill pipe is controllable, ash conveying amount is controllable, and filling of drilled holes can be conducted in time.