In John Fowles' The French Lieutenant's Woman,Sarah's personality is a complex system which can be interpreted within the framework of system thinking in complexity theory.The interaction of a large number of elements helps form loops and frame a dynamic personality system.Her aggressive and narcissistic personality makes her a more predominant figure than those traditionally-fixed female images.The indeterminate endings of metafiction is a breakthrough to the tradition.It differs from the foreseeable endings of the Victorian novels,and provides Sarah with more social significance.