根据“有无对比法”的基本原理,以“徐州邮政局网络改造项目”为案例,探讨“有无对比法”在技术改造项目中对“有项目”和“无项目”两种状况的基本设定,采用增量分析法,对技术改造项目进行改造前和改造后的综合效益进行对比分析和评价,从而得出技术改造项目全面综合后评价结论。为“有无对比法”在技术改造项目的后评价中的应用提供参考。 According to the basic principle of “whether there is comparison law” and “Xuzhou post office network transformation project” as a case study, “there is no comparison method” in technological transformation projects, “projects” and “ No project ”, the incremental analysis method is adopted to compare and evaluate the comprehensive benefits of the technological transformation project before and after the transformation so as to draw the conclusion of comprehensive comprehensive evaluation of the technological transformation project. As a “non-contrast method” in the post-evaluation of technological transformation projects to provide reference.