The present invention discloses a calculation, planning, and configuration method for a maximum latency of a power distribution network for an Internet data center (IDC): first, proposing an information element model of an analog circuit, specifically including an information current, an information voltage, an information resistance, and an information conductance; then, building an equivalent circuit model of the information system for the power distribution network for the IDC based on the basic element model; next, building an information current and information voltage constraint model based on the equivalent circuit model; then, calculating a maximum latency of the power distribution network for the IDC in consideration of channel congestion and a load priority; and finally, formulating a planning and configuration solution for the IDC in the power distribution network to minimize a maximum latency of an entire system.