The invention discloses an intelligent low-voltage load automatic transfer control device and a control method thereof. The control device comprises a main processor, a storage unit connected with the main processor, a DSP processing unit, an FPGA unit, an on-off input unit, a communication unit, a remote control output unit and a power supply unit for supplying power to the preceding units. The control method includes the steps that remote signaling and remote measurement information of two low-voltage incoming lines is collected, when power rationing occurs or a power supply on one side breaks down, incoming line and bus coupler switches are turned on and off after logic judgment is automatically carried out, and accordingly power supply transfer is finished and the initial state of power supply is restored. The traditional mode that a worker rushes to a site and the switches are manually turned on and off is replaced, power-off time is greatly shortened, economic loss of users is reduced, power supply reliability is improved, and meanwhile, labor intensity of workers and on-site work risks are reduced.