Equipment state monitoring method, device and system and nonvolatile storage medium

The invention discloses an equipment state monitoring method, device and system and a nonvolatile storage medium. The method comprises the steps that a first part set, a second part set and a third part set corresponding to power supply and consumption equipment are obtained, the power supply and consumption equipment comprises a power supply end, a power transmission end and a power consumption end, the first part set comprises parts of the power supply end, the second part set comprises parts of the power transmission end, and the third part set comprises parts of the power consumption end; a plurality of assembly sets corresponding to the multiple functions of the power supply and consumption equipment are generated, and each assembly set in the multiple assembly sets comprises at least one part in a first part set, a second part set and a third part set; according to a target monitoring mode in which the power supply and consumption equipment is located, performing digital twin simulation on a target comp