A fault detection system comprises a data server configured to collect parameters incoming from at least one apparatus, at least one fault-sensing module configured to generate an alarm signal if the parameter exceeds a predetermined specification, a monitoring module configured to restart the fault-sensing module if the fault-sensing module operates abnormally, and a remote controller configured to control the data server, the fault-sensing module, and the monitoring module. The method for managing the fault detection system comprises steps of storing parameters incoming from at least one apparatus in the data server; checking whether the parameter exceeds a predetermined specification by the fault-sensing module in a last-in first-out manner; generating an alarm signal if the parameter exceeds a predetermined specification by the fault-sensing module; checking whether the fault-sensing module operates abnormally by the monitoring module; and restarting the fault-sensing module by the monitoring module if the fault-sensing module operates abnormally.