The invention discloses a process engine-based automated operation and maintenance method and system. The method comprises the following steps of S1, defining a process template, drawing a process chart and deploying the process template and the process chart in a process engine; S2, defining process nodes, and calling a subsystem API or pushing a task at each process node; and S3, performing time monitoring at each process node, and when the calling of the subsystem API fails or the pushed task is not finished, sending out a corresponding information prompt. The system comprises a process deployment module, a process node definition module and a time monitoring module. According to the method and the system, the operation and maintenance process is deployed in the process engine, and the process nodes are set to control interface calling and task pushing, so that all subsystems and corresponding tasks in an operation and maintenance center are ensured to run according to a set process; and the time monitoring is performed at the time node to ensure the efficiency of interface calling and task pushing, thereby ensuring the operation and maintenance process to run normally, orderly and efficiently.