The invention relates to a control system and a control method for an aluminum ingot demolding machine, an ingot taking machine and an ingot transporting machine. The control system comprises a NO.9 switch, a NO.4 switch, a NO.2 switch, a NO.8 switch, a NO.6 switch, a NO.10 switch, a NO.5 switch, a NO.3 switch, and a NO.1 switch, wherein the NO.9 switch is arranged at the front end of a compacting machine; the NO.4 switch is arranged at the upper side of the tail end of the compacting machine; the NO.2 switch is arranged on a pushing machine; the NO.8 switch is arranged at the upper part of a clamp; the NO.6 switch is arranged at the right side of an ingot taking machine; the NO.10 switch is arranged on the side surface of the transporting machine; the NO.5 switch is arranged at the left side of the ingot taking machine; the NO.3 switch used for detecting a loosening-in-place signal of a casting mold and enabling a PLC (Programmable Logic Controller) to send a command of pushing an oil cylinder piston rod to retract is arranged at the lower side of the tail end of the compacting machine; and the NO.1 switch used for detecting an in-place signal of a pushing oil cylinder and enabling the PLC to send a command of allowing a next to-be-demolded aluminum ingot to be transported is arranged at the side surface of a pushing machine. The control system and the control method has the advantages and effects of facilitating the automation operation of the aluminum ingot demolding machine, the ingot taking machine and the ingot transporting machine, lightening the labor intensity of operation personnel, improving the working efficiency and enabling the operation and the system to be safer and more reliable.