Emotion is a “gauge” which passes through every part of our work. Having the effective skills of emotion management can bring positive influence to the efficiency that work tasks finish in. In consideration of the importance of emotion management and the relation it has with the efficiency of task finishing, this article puts forward the utilization of Bayesian network analysis for constructing a network model of emotion management. After that, the marketing working persons of T-Bank which is located in G province have been chosen by us as the research object, for the purpose of inspecting the concrete influence that emotional management abilities exert on the promotion of task-execution efficiency.The study shows that the emotion management ability scores of marketing category employees are in the range of 3 to 4 points, and the overall performance shows a positive growth trend. In the middle of emotional regulation ability and emotional expression ability, the degree of response of emotion management ability to task completion efficiency is the biggest. When we make comparison with the prior probability, the value of its posterior probability can have a change that reaches as high as 24.21%.Therefore, if enterprises want to improve the task completion efficiency of employees, they can improve the employees’ emotion management ability by establishing a good working environment, carrying out emotion channeling, and strengthening cultural construction and other measures.