The invention provides an electric vehicle charging device electric energy metering error detection method and system based on a standard battery. Different charging stages such as constant voltage charging, constant current charging and trickle charging in actual electric vehicle charging are simulated during a detection process. Through a time of detection, whole process electric energy errors, single-stage electric energy errors and arbitrarily set multi-stage electric energy error data are acquired. Rich test data are provided for test staff to analyze and determine an electric vehicle charging device. When a test is carried out, the system automatically feeds back electric energy tested by the system to a power grid. Energy waste caused by detection is reduced.