The invention relates to a boiler coal feeding method and system. The boiler coal feeding method comprises the following steps that coal is subjected to drying and quality improving at first, and pulverized coal is obtained; the pulverized coal is guided into an efficient pulverized coal bin; and air generated by an air blower is blown into a boiler hearth after being mixed with the pulverized coal. The boiler coal feeding method has the beneficial effects that boiler coal feeding equipment provided by the invention is simple in structure, safe in operation and good in universality. A large-size coal pulverizing system is not used, and land resources are saved; a drying and quality improving system and a boiler can be subjected to coordination control, and the invested cost is relatively low; the drying and quality improving system is in seamless butt joint with the boiler, secondary transfer is avoided, and the pulverized coal can be effectively prevented from polluting the atmosphere; and flammable and combustible potential safety hazards of the coal pulverizing system are eliminated, and brown coal and long-flame coal can be used by a power station safely and economically. Through a drying device, the high dehydration rate can be ensured, and the coal is not subjected to combustion reaction. The coal pulverizing electricity consumption rate is decreased through the boiler, and the combustion efficiency of the boiler is improved through the pulverized coal subjected to drying and quality improving.