Method and device for monitoring state of motor of system

The invention provides a method and a device for monitoring the state of a motor of a system. The method comprises the following steps: monitoring the state information of the motor; according to the state information of the motor, determining whether the state of the motor is gradually slowed from operation; if the determination result is yes, monitoring whether the state of the motor is changed from a gradual slow state to a starting state or not; and triggering at least one protection mechanism of the motor to correspond to the state of the motor after starting if the state of the motor is monitored to be changed from the gradually-slow state to the starting state. And whether the motor is restarted or not can be accurately identified after the quick switching device switches the power supply equipment, so that a correct protection mechanism can be obtained. 本发明提供一种系统的电动机的状态监控方法与装置，方法包括：监控所述电动机的状态信息；根据所述电动机的状态信息确定所述电动机的状态是否从运行变为渐慢；若确定结果为是，则监控所述电动机的状态是否从渐慢变为启动；若监控到所述电动机的状态从渐慢变为启动，则触发所述电动机的至少一个保护机制对应于所述电动机启动