The invention relates to an efficient energy-saving gas cooker which comprises a gas cooker core, wherein an energy-saving water ring is increased at the periphery of the gas cooker core for enhancing the heat transfer of the gas cooker, and water in the water ring is used for absorbing excessive heat. The center of flame of the gas cooker core is located at the arc position of the energy-saving water ring. One side of the energy-saving water ring, close to the frame of the cooker core, is semi-spherical. As the energy-saving water ring is increased at the periphery of the gas cooker core for enhancing the heat transfer of the gas cooker, and the water in the water ring is used for absorbing excessive heat, on one hand, hot water can be taken out for washing vegetables, dishes and the like; and one the other hand, the hot water can be placed in the water ring, and after the flame goes out, the remaining heat of the hot water can be used for preserving the temperature of meals. In the invention, principles of heat transfer theory, engineering thermophysics, optical physics, combustion science, material mechanics and the like are applied; the realized device has the advantages of simple production process, low production cost and stable working performance; moreover, the efficient energy-saving gas cooker has an energy-saving effect and is suitable for the energy-saving concept.