A power consumption control apparatus and a power consumption control method capable of providing a power storage being utilized as an uninterruptible power supply (UPS), and in a case of an emergency, automatically selecting a load to supply a backup power to the load, the power consumption control method including determining an occurrence of an abnormality in a supply of a grid power and a renewable power, performing an emergency mode to immediately finish a current operation of a load if it is determined that an abnormality in the supply of both of the grid power and the renewable power has occurred, and performing a standby mode to stand by until the current operation of the load is finished in a normal manner if it is determined that an abnormality in the supply of the grid power has occurred while the supply of the renewable power is normal.