The invention relates to a digital twin-based visual power system machine room monitoring system, which is used for managing at least one machine room and is suitable for the whole main body machine room with a plurality of departments so as to control a company main body or a cross-company main body. The digital twin-based visual power system machine room monitoring system comprises a machine room visual construction storage module, wherein the machine room visual construction storage module is used for providing at least one machine room information, correlated to a plurality of machine rooms, input by a user, each machine room information is corresponding to a department main body, and the machine room information comprises a power machine room simulation platform in conversion with a machine room site according to a proportion. Three-dimensional visual data of power machine room equipment is used as a reference object, a digital twin model with high integration and fusion is built,running fault forecast of the equipment is achieved, the probability of an equipment fault is reduced, and the strain capability of machine room safety is improved.