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The present application relates to a method for optimizing energy consumption of an electric-thermal integrated energy system with reduced loss, comprising: obtaining energy consumption data of the electric-thermal integrated energy system; processing the obtained energy consumption data, classifying it according to energy consumption regions, and dividing time periods; analyzing the energy consumption data of different regions respectively, obtaining consumption sources; optimizing the energy consumption of different regions respectively, generating improvement suggestions for the consumption sources; implementing loss reduction measures, and analyzing and comparing the loss reduction effects, recording the effective loss reduction measures for popularization and use. The present application also discloses an energy consumption optimization system. The present application obtains energy consumption data of different regions and different time intervals, monitors energy consumption abnormal nodes in real time; uses a normal distribution probability model of an expectation maximization algorithm to calculate the optimal energy consumption data distribution, generates improvement suggestions for the consumption sources, and optimizes energy consumption.

The present application provides a photoelectric sensing device, a photoelectric sensing system and a method thereof, wherein the photoelectric sensing device includes a diffusion film for introducing a light to be measured, a filter element having a plurality of filter coatings for filtering a detection light beam from the light to be measured, and a sensing circuit for sensing the detection light beam, and the photoelectric sensing device can provide a dual-band sensing function. In addition, the photoelectric sensing system and the operation method thereof of the present application include coupling a plurality of incident lights into first coupled light by a secondary light coupling element, coupling the first coupled light into second coupled light by a primary light coupling element, forming fluorescence by a part of the second coupled light passing through an erbium-doped optical fiber, and respectively arranging a first photoelectric sensing device and a second photoelectric sensing device on the secondary light coupling element and the erbium-doped optical fiber to monitor the state of blue laser light and fluorescence, thereby providing an instant monitoring effect.