Abstract: With the rapid development of broadband communication technology, the service of network video was popular anywhere. Although people can watch network video conveniently, network video quality may be impaired by various factors during the transmission process, leading to the quality of experience (QoE) decrease. In order to solve the problem of network video quality assessment, an assessment method using fuzzy control was proposed in this paper. Firstly the main impair indexes of video quality were analyzed，such as network, application and image indexes; secondly these indexes were extracted by simulation experiments under different environment, next three levels fuzzy control of assessment model was built; to further improve the accuracy of this method, every fuzzy level was given different weight, and two kinds of de-fuzzification methods were given. This method considered different factors, and had wide applicability and good practicability. Experimental results show that the proposed method can improve the similarity between the subjective and objective better.