The hazards of stimulated Raman scattering (SRS) to intense laser systems are introduced, mainly including stimulated rotational Raman scattering (SRRS) generated by intense lasers during long-distance transmission in air and transverse stimulated Raman scattering (TSRS) in large-aperture KDP crystals. It is shown that SRS not only loses laser energy and reduces beam quality, but TSRS may also damage KDP crystals. To address the harm of SRS to the intense laser system, the main suppression schemes of SRS is introduced at home and abroad, the new idea of reducing the SRS gain by controlling the polarization direction is also focused on.