门禁系统安装是为了以预防损失、预防犯罪为主要目的，因此必须具有极高的可靠性。一个门禁系统，在其运行的大多数时间内可能没有警情发生，因而不需要报警，出现警情需要报警的概率一般是很小的，但是如果在这极小的概率内出现报警系统失灵，常常意味着灾难的降临。因此，门禁系统在设计、安装、使用的各个阶段，必须实施可靠性设计和可靠性管理，以保证产品和系统的高可靠性。
The installation of access control system is to prevent loss and crime, so it must have high reliability. An access control system may have no alarm during most of its operation time, so it does not need to alarm. The probability of alarm is generally very small, but if the alarm system fails within this very small probability, it often means the advent of disaster. Therefore, the access control system must implement reliability design and reliability management in all stages of design, installation and use, so as to ensure the high reliability of products and systems.