Controlling system for power distribution

A controlling system for a power distribution unit (PDU), comprising:

• a computer having a controlling interface and linking to a network;
• a PDU linking to the computer through the network and having multiple outlets, a turn-off time for each outlet;
• and
• multiple electric apparatuses respectively connected to the corresponding outlets of the PDU to have an AC power source, and linking to the computer and PDU through the network, wherein each electric apparatus stores a shut-down period;
• the controlling interface of the computer having:
• a shut-down option having a first main time axis, multiple outlet numbers corresponding to the outlets of the PDU, and multiple variable time axes respectively corresponding to the outlet number, wherein
• the first main axis has a zero time and a final time;
• and
• each variable time axis has a total period, a start time and an end time, wherein the total period is determined according to the shut-down period of the electric apparatus for the corresponding the outlet number, and then the turn-off time is further calculated from the zero time to a time on the first main time axis corresponding to the end time of the variable time axis, and the turn-off time is sent to the PDU by the computer, and the start time and the end time are adjustable.