The monitoring station of BDS is one of the important components of the ground monitoring part. There are many types and quantities of equipment. During the long-term operation, with the accumulation of operating time and the aging of equipment, various equipment failures are inevitable. In order to ensure the overall long-term stable operation of BDS, it is necessary to minimize the operation interruption time caused by equipment failures at the monitoring station, which is particularly important for the rapid detection and location of equipment failures. Based on this, a fault monitoring and diagnosis method for the monitoring station of BDS is designed. This method carries out fault processing from two levels of automatic monitoring and intelligent diagnosis of equipment faults, which can quickly detect and locate faulty equipment and its causes, replace faulty equipment or modules in time, and restore the monitoring station to normal operation as soon as possible.