Based on human' inherent characteristic, the state of network information security, etc, it is necessary to form the human errors analysis theory for network information security. The theory can be established, because it has possessed three conditions: theoretical basis, technological support and practical environment. This paper discusses the three conditions. The final goals of the human errors analysis theory for network information security reduce and prevent human error and strengthen human's management in network. The theory conduct an investigation into ordinary behavior rule of human ...