The invention provides an integrated Raman optical-mechanical system which comprises a semiconductor laser light source, a first optical system, a volume Bragg grating, a dichroic mirror, a second optical system, a protection window, a long-wave-pass filter, a third optical system, a slit, a dispersion module, a detector, an analysis processing module, a semiconductor refrigerator, a shell, a photoelectric detector and a light source drive control module. According to the system, the Raman laser light source, a Raman probe and a spectrometer are highly integrated, coupling loss between components and Raman interference introduced by transmission fibers are eliminated, the system is compact in structure and small in size, the energy utilization rate of the system is increased, and sensitivity of the system is improved.