The invention discloses a method for evaluating a service carrying capacity of a power regulation and control center based on a work-hour measurement method. The method comprises the steps of: (1) determining a service carrying capacity evaluation range, and determining scheduled working items, a research object and measurement time; (2) calculating total time Ttotal for completing the scheduled working items everyday; (3) calculating effective time Teffective of working of each person in every day; (4) calculating a rest coefficient A of the research object; (5) calculating number of people ought to be staffed in work according to a formula N=Ttotal/Teffective*A; (6) calculating the service carrying capacity according to a formula l=N/n*100%, wherein n is a number of present staff; (7) and analyzing the service carrying capacity. Through establishing a service carrying capacity analysis model, the method can obtain the optimal post configuration scheme and the corresponding service carrying capacities of the staff, can realize the effect of predicting the annual staffing demand, utilizes the power regulation and control center service carrying capacity analysis model to realize continuous improvements made by the power regulation and control center in the aspects of predicting the personnel quota demand, operation node distribution, optimizing talent equivalent density and the like, and realize the matching of workload, quality and the personnel number of the power regulation and control center.