The invention provides a processing method, a terminal, an equipment management server and a system for customizing tasks in equipment management. The method mainly comprises the following steps: the equipment management server issues the task operation; the terminal monitors and issues the triggering condition of the task implementation, and reports the implementation condition of the task; whenthe task is not implemented at the terminal according to the triggering condition normally; the equipment management server issues a task command, and the terminal implements the operation according to the command; and the terminal reports the task implementation condition. The invention also provides an effective mechanism for ensuring the implementation of the customized task, reduces the uncertainty of the terminal equipment management, improves the flexibility of the terminal equipment management, satisfies the customized requirements of users, and improves the quality of the equipment management server.