The present invention discloses a power distribution transformer energy saving amount measurement and evaluation method. A current and voltage transformer, a power distribution transformer energy saving amount measurement terminal and a background evaluation system are included. The power distribution transformer energy saving amount measurement terminal comprises an electric energy loss amount acquisition unit, a central processor, and an electric energy loss amount transmission unit. The current and voltage transformer detects the current and voltage of a power distribution transformer and transmits the current and voltage to the electric energy loss amount acquisition unit. The electric energy loss amount acquisition unit obtains an electric energy loss amount according to the current and voltage and transmits the electric energy loss amount to the central processor. The central processor analyzes and processes the electric energy loss amount and transmits the electric energy loss amount to the background evaluation system through the electric energy loss amount transmission unit. The background evaluation system evaluates the electric energy loss amount. The method has the advantages that the effective measurement and evaluation of the power distribution transformer energy saving amount are realized, the accurate operation information of the power distribution transformer can be obtained, and the operation efficiency of a power system is improved.