Since its formation, SWOT method has been widely used in strategic research and competitive analysis, and has become an important analytical tool for strategic management and competitive intelligence. Intuitive analysis and simple use are its important advantages. Even without accurate data support and more professional analysis tools, we can draw convincing conclusions. However, it is this intuition and simplicity that makes SWOT inevitably have the defect of insufficient accuracy. For example, SWOT analysis adopts qualitative methods, and forms a fuzzy description of the competitive position of enterprises by enumerating various manifestations of S, W, O and T, and the judgment made on this basis is bound to be subjective. Therefore, when using SWOT method, we should pay attention to the limitations of this method. When listing facts as the basis of judgment, we should try our best to be true, objective and accurate, provide some quantitative data, make up for the deficiency of SWOT qualitative analysis, and build the foundation of high-level qualitative analysis.