本文共分五章:第一章主要介绍了虚拟仪器的基本概念、虚拟仪器与传统仪器相比的优缺点,以及虚拟仪器的现状和前景；第二章介绍了Labview的运行环境、界面,下拉菜单,以及工具栏. 第三章主要介绍了Labview的工具面板和控件面板；第四章主要介绍了虚拟仪器的框图语言；第五章介绍了频谱分析仪的设计和调试的整个过程,以及Labview的其他方面的应用.-This article is divided into five chapters: The first chapter introduces the basic concepts of virtual instruments, virtual instruments and the advantages and disadvantages compared to traditional instruments, as well as the status and prospects of virtual instruments　The second chapter describes the operating environment Labview interface, the drop-down menus and toolbars. The third chapter introduces the Labview panel and control panel tools　fourth chapter introduces the language of the virtual instrument diagram　fifth chapter describes the design of spectrum analyzer and debug the whole process, and the Labview other applications.