Ｎｏ．７信令网是现代通信网的重要组成部分，Ｎｏ．７信令系统的测试成为通信安全的必要措施。作者论述了Ｎｏ．７信令监测系统的总体设计，讨论了实现Ｎｏ．７信令监测系统的软硬件划分方法，介绍了Ｎｏ．７信令监测系统的软硬件设计。讨论了不同制式交换机Ｎｏ．７信令的互通故障，强调了在Ｎｏ．７信令系统设计时应充分注意的转换技术 No. 7 signaling network is an important part of modern communications network, No. 7 signaling system testing has become a necessary measure for communications security. The author discusses No. 7 signaling monitoring system of the overall design, discussed the realization of No. 7 signaling monitoring system hardware and software partition method, introduced No. 7 signaling monitoring software and hardware design. Discussed the different standard switchboard No. 7 signaling interworking failure, highlighted in No. 7 signaling system design should pay full attention to the conversion technology