Power supply control method and device

The invention discloses a power supply control method and a power supply control device, and relates to the field of power supply control. The power supply control method comprises the steps of detecting whether a power grid is in a normal state; when the power grid is in a normal state, respectively controlling a new energy interface and a power grid interface to be communicated with a load, anddisabling the output function of a second interface, so that new energy power supply equipment and the power grid complementarily supply power to the load; and when the power grid is in an abnormal state, controlling the new energy interface and the power grid interface to be disconnected with the load, starting an input function of the first interface, and starting an output function of the second interface, so that the new energy power supply equipment supplies power to the load through the uninterruptible power supply. According to the power supply control method, the reliability of a powersupply system can be impr