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Because of the wiring method is different in application,the normal three phase electric energy meter have many voltage specification types,it causes the manufacturing and maintenance cost of the electric energy meter manufacturer very highly,and it is also difficult for the user to use and manage. In this paper,it describes a three phase electric energy meter which can be adaptive in 3P3W or 3P4W system. The meter used the three phase voltage amplitude and included angle as basic data which measured by itself,and combined with the industry standard,technical specification and actual operating environment of the electric energy meter,formed a suit of mechanism which used to recognize and manage the voltage specification,adjust the meter parameters,display and alarm,then used software program to achieve the different voltage specification adaptive function. The test result shows that the adaptive electric energy meter can work correctly under the power grid system whose voltage specification is 57.7 V,100 V or 220 V. The adaptive electric energy meter can perfectly satisfy the technical specifications requirements of State Grid in the Q/GDW1827-2013 Technical specification for triphase smart electricity meters for the class-0.2 S three phase electric energy meter. it has high quality-price ratio,and broad market prospects.