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In the test of hybrid vehicle on chassis dynamometer for calculate the fuel efficiency, we using driving cycle called "FTP-75 mode". Driving a vehicle on chassis dynamometer with a CVS(constant volume sampler). And save the emissions at 3bags in FTP-75 mode each phases. Then, calculate the emissions and fuel efficiency with a carbon method from 3 bags. But hybrid vehicle has additional energy sources like electronic energy. So established method can not calculate and can not be a correct method, because additional energy help to engine by motor, and engine operation area has smaller. So J1711 said to have a phase 4 in FTP-75 and calculate all of phase to have a correct fuel efficiency in hybrid vehicles test. In this study, try to calculate the fuel efficiency and emissions, driving a hybrid vehicle on chassis dynamometer with FTP-75 phase 4. As a result, fuel efficiency with 4 phase method system has decreased about 4%, compare to 3 phase method