A security management system for a remove working environment, a computer program therefor, and a method therefor are provided. The security management system monitors and tracks a behavior of an endpoint in real time after execution of a process or a network access time point. Furthermore, the security management system monitors a behavior of an operating system level on the endpoint to which the security policy is not applied in real time to detect a behavior which threatens the security management system and controls the endpoint. Furthermore, the security management system corrects and manages the security policy in response to a request about exception application of a predetermined security policy in real time to flexibly perform security management of the endpoint.