Abstract: Rotating-strip-port is wildly used in gas cookers at present. 15 gas cookers of this kind of port were selected to test the performance such as efficiency and emissions under 10 different gas components. Results showed that rotating-strip-port gave no much better performance than round -port cooker, CO emissions usually were higher and tended to exceed standard with changing of gas components. However, the decrease of NO_x emissions has a remarkable effect.