The invention provides a coal-fired unit denitration desulfuration assessment management system and a method. Through adoption of the coal-fired unit denitration desulfuration assessment management system and the method, manual workload of workers related to a power grid can be decreased, data acquisition, data processing, data analysis calculation and display functions to smoke concentration and operating states of a device can be automatically completed, monthly and annual analytical reports can be automatically provided. Moreover, the coal-fired unit denitration desulfuration assessment management system is simple in structure, low in cost, capable of achieving highly integration with an existing system without influence on each other, and easy to achieve.